I felt drained just reading your post, you living with it must be totally exhausted.
The important thing to me was the end of your post -
"I just really am unsure of what these things are , or whether they are even anything ? It's starting to really take its toll and become quite unattractive I guess.
Let's look at this first. Are you trying to diagnose him? Relate it to depression over his Dad's death or ADHD/Autism/something medical? Given that you've said "I have noticed these things since we first got together" I think we can rule out it being a reaction to his Dad. So do I think "any of these symptoms point towards anything" - not really. Possibly. Maybe. Maybe not.
I do however think that you would you prefer it to point to something. You would like there to be something that you could point to, something about which you could say 'See, it's because he's got X, he's not choosing to be like this, he does love me, he just doesn't see that he's draining the life out of me and making me responsible for everything, having X stops him from being able to see what he's doing to me!'
I can see the attraction. Because if he has X then it's not your fault, it's not his fault, it's X's fault and once you both know you're dealing with X then there will be a way to make it work. Happy endings all round, march into the sunset hand-in-hand.
What if he doesn't have X?
Then you're faced with his behaviour being how he chooses to behave. How he chooses to treat you.
You describe him as "gentle , very caring affectionate and loving towards me, his family and our son ...rarely gets angry and he has a very laid-back disposition". All good qualities - but you can have too much of a good thing. Being laid-back can backslide into being lazy and unmotivated, and frankly everything you've listed as a 'symptom' could easily fit under that category. My guess - and it is just a guess - would be that he is content to drift, leaving all the decisions and responsibilities and effort to whoever will pick up his slack. You being 'whoever'.
And that's why I think you'd prefer if there was an X you could lay all this at the feet of. Because dealing with a lazy/unmotivated partner, is unpleasant and makes you wonder if they love you at all. (Possibly. Maybe. Maybe not. ) And, you have to make a very important choice between three options.
- He gets his act together, you stay
- He continues being lazy/unmotivated, you stay (exhausted and unhappy)
- He continues being lazy/unmotivated, you leave
Now, he is NEVER going to get his act together if you don't make it VERY clear to him that this just cannot continue, that you are buckling under the pressure. So you need to talk. And there we have the last thing you say in your post - "I love him so much and worried that if I ever said anything he would get very upset by it." Well, he should get upset about it, when he realises the pressure he is putting you under. And you absolutely should not be worried about upsetting him. Unless maybe you are worried that he won't be upset, but will instead be very laid-back about it?
You need to talk to him about this.