My head is all over the place!

I've got a complicated set up at the moment. My boyfriend and I have just split a few days ago but we still live together. The reason for that is because the house is his so he is obviously staying and we have kids, I have no where else to go so rather than move the kids out from the comfort of their own home from place to place until I get somewhere we decided to live like this for now. Anyway, he says he doesn't want to be with me anymore because of the shit I put him through in the past. He makes me sound like a horrible person when it's the other way around. He's the one that put me through shit, physically and mentally. BUT all in all we had a pretty good relationship I thought. We argued yes but that's life! He doesn't do too well with communication and thats where it falls apart because without communicating how are you supposed to sort anything out right? So anyway, we've split, ok whatever I'm just going along with what he wants and I'm just taking care of my kids and me. But every now and then he'll say stuff that makes me think Wtf is actually going on! Like hes on about starting up his new business and asked me to come in on the business with him, he's talking about Christmas together at home and stuff like that. It's like mixed signals, I'm trying ignore it and not read between the lines but oh my god its messing with my head!