Hi,
This is my first post. I am alone and full of self doubt, and really need some perspective on things, and maybe some support along the way.
I've been with my partner for 10 years, engaged for 9. We have on child at school and our second on the way. We separated last Autumn, it was sudden and not as planned as I asked for, but I've been managing well against all the odds since.
Things have been up and down between us- he has invited himself back into our home and lives several times since (hence baby number two) but disappeared again as soon as I questioned his behaviour or tried to discuss the future. This is tremendously hurtful, scary and disruptive, yet I seem to have an infinite capacity to forgive him, start again and even blame myself for what he does.
He has lied to me since our first date, about all sorts of things, big and small, sometimes on a daily basis. We had years of counselling, which helped me get stronger and more independence, but the lying just got worse. Prior to our separation he had just lost his second well-paid, comfy job in a year for gross misconduct (faking his working hours, stealing computers to clock in/out as he pleased, coercing colleagues to lie for him...and not being there). Soon after that, I bought my first car, and had to cancel my insurance when they informed me he had made 3 claims for car accidents in 1 year (hi fault), which I had no idea about.
For him it's a family culture- his parents, siblings and friends usually cover for him, which is kind of terrifying for me. He also became extremely anxious and absent minded all the time, so I feel more like his therapist or carer, and lived on edge about what he'd do next, and wet the bed nightly with sweat or unrine, which he generally refused to acknowledge, but left me desperate.
Over the years, I have discovered tens of thousands of pounds of debts, insurances cancelled, masturbation to porn at work, unexplained cash withdrawals, secret correspondence with my family and friends, dangerous car maintenance, bullying our child, fictitious life stories and small, every day lies that leave me tired, crushed and frightened.
He always blames me. Often I give in and try to adjust my behaviour to suit him, but it never works.
I know I'm not perfect. I say terrible things and I can be critical. But I went through a crazy physically abusive relationship prior to this one and blamed myself for that too, until the police referred me for specialist counselling. Now I feel I'm stuck in another coersive web, where his mother too is pressurising me to 'accept who he is' and that he is like this because I somehow deserve it, but neither of them show any concern for our children or me.
I am so, so alone. I have no family or friends- they are all taken in by him, and he's been manipulating them against me for years. I used to have such a sociable, exciting life before I moved away to be with him, and I'm trying to rebuild my support network slowly, but I'm scared that everyone else is right and I'm the one in the wrong, and not a nice person...or why would they cut me and our babies off like this?
After a few weeks of seeming completely changed and asking me to move to the other end of the country for a fresh start (away from his family, he said), it turned out he was still living paralell lives. He left and we haven't seen him for over a month, despite anniversaries and his 40th birthday. Me and our little one manage okay (I work full time in healthcare and do massive school runs). Yet he sends one text, not even apologising, and I'm smitten again- only to screw me/us over again within days and ignore all communication. Why am I like this?! I need to gain control of my emotions and have now blocked him, but I need more back up! Or maybe I'm being unfair? Maybe I don't understand men? 
I'm sorry this doesn't make much sense. But if anyone has chance to talk I'd be grateful for your time 