What I would you do?

So my fiancé has been acting really different lately. We met online we talked for months finally he told me I had to meet him and go through with it or else he had to move on. I think I liked the thought of having someone talk to me rather then actually meeting them. I had just gotten out of a 7 year relationship. Anyways we met up and what do you know I conceived the first night I met him. No harsh words please. So I did what I deep down knew in my heart I kept my son and we stayed together. We have been through sooooo much it's more then anything I ever been through with my ex of 7 years. Anyways I now have another son who is 8 months old and my oldest is 2 in feb. Anyways we are getting married August 18th this year. I honestly feel so detasged we haven't slept together in no joke a month I feel like we aren't going to make it. Well we got into an argument this morning and he told me I don't love him but I truly do I just don't know how to show love physically. Then he told me this morning that he doesn't want to marry me. My parents just drove 16hrs to be here I haven't seen my fam since September. I just feel like why is everything falling apart. Like we we busy with our two kids but I don't think he would say that just out of anger I feel like deep down he actually doesn't love me anymore. He use to be so different now I feel like he could take it or leave it. He use to console me when I was upset now he just like walks away and won't talk to me . My parents just bought my wedding dress for $2,200 and then he tells me he doesn't want to marry me. Even if he didn't mean it that's all I believed now. I feel like we are a joke I didn't even know him and I got pregnant and we worked so hard to make it work and to be the best mom and dad. Our kids are number 1 we put are whole heart into being good parents. I just don't know if staying together is teaching my babies to stay even if it isn't right...

I want them to be in love and there is no doubt in my mind that I don't live my hubby but I just feel different after he said that to me today

He also has been so thoughtless I am planning the wedding and was going off and I mean it's $5k we are o my apendingj and like he works and I sit home all day alone with. O friends or any of my family around he hardly even talks to me. I say you just don't even care what I am talking about so you and he said no I don't. I just wish you were sexier. 

Like would you leave is it time to pull the plug😔 I am afraid to do this alone but I have a great job back home where I am from. I am currently on mat leave. Once I give up my job that's it it's gone. Like should I just pack up and go home