I'll try and give as many details as possible without outing myself.. Half rant, half needing advice 
1DC, under 1 year. DP/XP is a complete bastard. I could spend all night writing about the twisted, fucked up things he's done but here's a few:
- wanted me to meet all his friends/family right up until I got pregnant - fairly certain he still hasn't told his family about our DC
- financially contributed fuck all - literally £0. Has loads of disposable income - a few hundred a week - but spends just on himself and makes up lies about having no money when I'm struggling to afford basics for DC
- Gave me an STI when I was heavily pregnant - didn't tell me, got himself treated and avoided sex, I only found out because I had thrush and was tested for everything just to be on the safe side. If it hadn't been detected DC could have caught it and got pneumonia or had eye problems. When I confronted him he laughed and said I hadn't got it from him.
- Multiple times touched me/done things after I'd repeatedly said no - but he's stronger than me and I was in a lot of pain by the end of my pregnancy so found it hard to physically make him stop
- tried it on with a friend of mine then blamed her
- fucked off for several weeks once DC was born - never asked how DC was, made up a shit excuse as to why he hadn't seen DC, and then only bothered talking to me to ask if I'd healed up and was able to have sex yet
- Pretty much completely ignored DC on the rare occasions he has seen DC. Repeatedly tried to have sex with me instead, never even said hello to DC/cuddles etc despite me trying to help him get to know DC.
- constantly put me down for the way I parent - told me that I was spoiling DC for feeding several times in an evening (cluster feeding) as a newborn, said I should leave DC to cry instead (at literally a few days old.... Wtf!)
- Made thinly veiled theats to take DC away
Most recently he's been using OLD, profiles updated, he completely denies. Just so done with it. I haven't put the worst things he's done but I'm so drained from trying to keep it all in and deal with it. He doesn't know that he isn't on DC birth certificate - he never bothered to find out how parental rights work so at least there's that.
- told me stories about quite severe fights he'd gotten into - then reassured me afterwards 'but don't worry I haven't hurt a woman before'
I don't know what to do now. He scares me and I think he might be a sociopath. He compulsively lies and has no conscience what so ever. I don't want him anywhere near DC for DCs own good - during the pregnancy I tried to put everything else aside for the chance he might be a fantastic father but he's awful and dangerous. He's spoke before about how the best way to hurt someone is through their family and he knows where my Family live. Scary.
What do I do?
I'm scared to see him, I don't know what to do. Money is really tight and I've considered filing for child maintinence but I'm scared of what he'd do if I did that. Would that also give him parental rights? Should I just cut ties and hope he stays away? He's always expressed an interest in spending more time with DC once they're able to talk and be independent and I'm scared of what he would say to DC and I'd never ever trust him. My every instinct tells me to keep DC as far away as possible.
What do I do?