Not in Love Anymore?

me and mySO have been together for 3 years 4 months, and we have been through so much. from the most amazing times, through verbal and physical abuse, too recently just finding out he cheated on me. Most of you are probably thinking why would I stay then right? Well I was so in love w him to where I thought he would change. which he has changed Alot, and he cheated almost a year ago, something I'm working on getting over. BUT I don't think I am in love anymore. I love him for the simple fact he's my daughter's father but that's it. We barley have sex, Im not at all interested in doing so or initiating any type of sexual activity. We've been sleeping separate. I hate kissing. You know like when you make out, but your just holding your breathe and just there until it's over ?? that's what I do.

It's gotten worse and worse over time.. we've talked about splitting up but never do it. he said he loves me but not in live with me either. so he knows and can't feel the love from me. I guess I am just trying to figure out how to break up civilly?? without any issues. I also know that if we do break up, he wants our daughter 50% of the time, which I am not ready for. We can totally handle this out of court I think. besides that though, how do I leave him? how do I let him know it's over an just isn't the same and actually accomplish this break up instead of holding onto it and just saying that's what I want?

A little more background info, we got our house (rent) in May, find out he cheated like a month later, have a 1 year lease, our first place on our own. have no where to go back to if I do leave. don't make enough yo afford it alone. he takes the kids to school and picks up 1 after. (I work super early and get off late, travel time to work is almost 2 hrs and same on the way home) have no family that can help, the 1 who could've just had another baby so don't want to ask her for too much. he could always leave but can't afford the place. I want another child in life, but not with him but also not w another guy. I have a son from previous relation ship. I need some serious advice and help on what yo do and how to do it. plus I have no friends to talk to about this and family doesn't care. they think I should stay. they also don't know all of what has happened.

help!