Boyfriend kicks me out now expects me to move in again?

6 months ago i was happily planning to move in with my boyfriend of 3 years with my 3 children one of which is his (the youngest) i was willing to give up my three bedroomed home to live happily ever after with him and his eldest daughter, so i moved most of my stuff in and getting ready to give up my council place, we had a silly argument and he told me to leave, i was upset and moved back home feeling it was a good job i hadnt given up my place as i would have made myself homeless. Any way 4 months went by and i missed him we got back in contact and slowly starting meeting up and getting back happy again, now i have found myself in the possition where me and my children are back staying at his place and he is asking me to move in again? i dont know what to do i want to be happy with him and make our little family work but i am so scared to give up what me and my 3 kids rely on (our home) to be told to get out again and be homeless, Please someone tell me what to do? thanks :(