Confused. Does he want out or not?

I've been with my partner for 18 months he has his 2 sons full time I have my daughter full time.
We use to talk about having another between us a house just a future together (we don't live together yet).
We went away one night just us to the city where I was 90% sure he was going to pop the question but he didn't. He was hinting for a very long time and was really pushing for us to go away.
Now it's if I behave he will ask. Or why get married now if we keep fighting. But I'm thinking why be together if we keep fighting.
But every time we fight he will say things like just leave me then or why don't you just go. We got into a huge fight the other day and he said that when we go home (we were camping) we will go our separate ways. He calls me names like fuck whit. But then can be so nice.
I could be so stressed and he will just push me to be more stressed by picking on me calling me crazy etc. I was rumiging through the car when I was over stressed looking for a post card I had bought my granny for her birthday and he said stop abusing the car and every thing in it it's disrespectful to my parents (we were in their car) I wish he would just say here let me help. He kept pushing me and pushing me with his words. I ended up shoving him which I regret so bad. His oldest son told me to leave him alone. He then said his sons name and I know she is being so mean to Daddy isn't she she needs to stop. We had a dinner date planned at the pub where the kids would be looked after but he said he wasn't going with me after I got all dressed up because of the mood i was in. I told him that I was stressed having 3 kids under 5 in a caravan all week fighting and screaming. I was loosing my mind but he said that wasn't true. No one apparently looses their mind with 3 kids. I pushed to go out but he kept saying no. I'm so confused. I have allot of PTSD and anxiety and depression. Just little things set me off. He got of a seat a little while ago and his feet hit the floor hard and he walked towards me. I jumped and went stiff. His comment was what you think I'm going to hit you! I have been hit by my daughters dad a few years back. He doesn't support me through anything any more. He always says I bet you miss your ex. I say how when he tried to have my baby aborted and then held me in his house all doors locked no keys for a week and pregnant with a gun sitting in the bed side table. Why would I miss that. He would laugh and say year right he did that.
His said I'm shit in bed in another fight we had his told me I'm over weight.
I sat on the beach the other night where he came down soon later. He didn't make the effort to talk I had to tell him to sit down he was silent for ages then said well this was a waist of time sitting down I'm going to bed and then I started to talk which I did all the talking then. I told him we weren't getting along and I don't think we are meant to be. We should maybe think about going our separate ways. I was in tears at this point. His response was well if that's what you want then do it. To me that tells me he wouldn't care and doesn't want to change us? He told me he doesn't know what I want. I told him I want to not fight I want kind words. I want someone to want to see me in the white dress in ore. I don't want to be sworn at and called names. I want to be loved. He didn't reply to this. Was that to much to ask? When I came to bed he tried to have sex with me making me kiss him. I said I wanted to sleep he kept saying I want a kiss a nice one and a long one I kept saying no so he got off me and he rolled over and didn't hug me after I told him I wasn't coping well with my PTSD. Am I just there for sex now?
I had the worst day the other day I had a migraine vomiting on the Rd side I lost my Visa card and I almost had an accident in the car on oil on the Rd. I posted this on FB
Every one asked if I was okay which I was. He messaged me saying sorry but wtf is with that post. I said what do you mean. And ps thanks for your concern. He then commented on my status saying OMG I hope your okay babe!!! So the world could see his concern but couldn't call me or anything. He was there when I was vomiting but didn't ask if I was okay. Just said what are you doing. He didn't know about my near accident. Why can't he ask me instead of asking for everyone to see to think his a caring boyfriend?
But today he has been so nice asking how I am and how my day is going. I don't know where I stand any more. I don't know if he wants out but doesn't have the guts to do it. My daughter thinks his her dad as she doesn't have one so that's why it's so hard for me to leave.
Am I over reacting. Am I asking for to much. Do I just say good bye to the man I love but not sure if he loves me??? I'm so stuck so lost.