I've nc'd for this post. It's been a long time coming but I'm at the end of my tether and not sure if I'm going mad or perceiving things right. I'm not even sure if this is the right place to post due to other elements of the issue.
Anyway. It is regarding a male friend. We used to be a couple - it was on and off for about 18 months, and definitely off for the past six months or so. I think the reason it has remained 'off' is because I am less susceptible and more willing to stand up for myself.
It seemed like this was going well. I have got much better at remaining calm when he is pressing all my buttons and being utterly unreasonable, and explaining to him calmly. Actually his will concede the point (after the fifty millionth time of navigating all his attempts at derailment). But it's exhausting! He also has a drink issue which has flared up again recently and I have to walk off when he is drinking because he gets more and more unresonable, critical of me, and wanting to argue.
The wanting to argue thing - I don't mean he wants to argue is a personal way, he just wants to debate everything constantly in an aggessive way. I'm normally interested in discussing politics and other debatey-type subjects, but the manner in which he does it sets my heart racing, I'm on the edge of my seat etc. I can't even say something factual without him arguing about it! So I end up having to explain and point out the research/studies/evidence of every tiny thing. It is so incredibly stressful trying to say anything, plus he interrupts - if I point it out, he says I do it too.
This is a general thing he says about everything - if I try to explain why he is utterly infuriating me, or something is difficult, he does this look (a sort of guilt-inducing look like you'd do at a small child who you caught misbehaving) and tells me in a lecturey way that whatever the thing is, I do it worse. But he compares ridiculous things! Eg. an overarching one is that he compares him being a twunt when drunk to me needing a chat or hug when I'm struggling with my mental health. They're not the same, are they? And even if they were I basically can't talk to him about anything/confide in him anyway, because I get a load of condesceding mansplaining about how I shouldn't feel the things I feel, how I'm completely wrong, all wrapped up in - this is so hard to describe - a sort of "but I love you, you just need to try to behave" patronising type thing. He doesn't use those words exactly (though he says he loves me sometimes as if that means I should 'obey' him...) it's just his whole manner that gives that impression.
Also, within 'debates', he seems to have no attention span. He often interrupts if I try to make a point, gets distracted by a screen, suddenly announces he needs the loo and wanders off etc. If I can actually make my point, he then replies and goes off into a monologue, changing the subject several times, but all in a sort of aggressively defensive way as if I'm arguing with him but I'm not saying anything! I'm supposed to listen with rapt attention to the most tedious and irrelevent stuff! It feels like I am expected to be some kind of 1950's downtrodden housewife saying "Yes dear, you know best, dear", combined with being his mum and having to teach him about the basics of social interaction. He seems to have become a grumpy old man, very quickly. I am actually concerned that he may have a degenerative brain condition (he's 41 so not old) or something; he literally seems to be losing the ability to interact. I know he is very unhappy - currently signed off with depression - and I try to be supportive and encouraging as far as that goes.
Reading over this it sounds quite bad, he will be kind on occasion, it's just I never know. And sometimes he'll be kind but then randomly start lecturing me. But the thing is - the stuff I've written is happening more and more. It used to be the odd occasion, now it's almost constant. My awesome fun friend who used to giggle with me observing the little quirks in life has gone, just the odd glimpse of him now. 
The other thing that is confusing me in a situation that otherwise seems straightforward (LTB!) is this: people think I'm a bitch. It really hurts, because I have always tried so hard to "do the right thing". I try to help people if I can, I don't lie (but try to be tactful!), I try to do what is right, not just what I want/what is easy. I was brought up in a religious family which has obviously affected my philosophy on life. I want to give, to be kind, to nurture, to love people even if I dont like them. I realise this sounds incredibly cheesy! Unfortunately I also didn't learn much self worth growing up, so obviously was ripe for being taken advantage of, not knowing how to stand up for myself/being a people-pleaser.
But I am widely believe to be a horrible, attention-seeking, manipulative person - people have actually met me and then been surprised I'm nothing like my reputation. It largely seems to centre on my MH issues - it's as if people can't accept I'm 'ill'/struggling/can't always act 'normal' because at other times I seem perfectly fine/coherant. I also (until recently subconsciously) resist being "othered" and want to be seen as a person, not have my thoughts or quite understandable issues dismissed as me being mentally defective. I dunno, maybe I am barking up the wrong tree, but I'm pretty sure I'm not a horrible person so there must be some explanation. I often feel I must just be fundamentally worthless but then surely that's the depression speaking?
Anyway, my friend's other friends apparently tell him he shouldn't go near me. As if I'm the one causing problems. Also due to my issues I have never been wildly popular, have often been lonely, and have recently lost a few friends (well, one proper good friend and others in the same social group by extension) because I just cannot deal with feeling so utterly unaccepted as myself, or treated as a lesser person. So I keep thinking: maybe it is me? Maybe I am reading things all wrong?
I'm sorry this post is so long and complex; I didn't want to drip feed or miss the point.
For info: I am on benefits for longterm MH issues involivng depression/anxiety/trauma. I see a therapist weekly but have no NHS support and fighting for it just wore me out, better spend the energy on getting better! I have no DC and am early 30's.