My SO has a problem with me having children already

I only realised today that it was a problem to him, I gave up my whole life to move to be with him, but if I ever want to do anything he complains that he has to look after the kids and that he should do what he wants to do whenever he wants, what I want never seems to be a concern to him, I moved here 8 months ago and haven't been out to do my own thing once because she complains. 
He says if they were his own kids he would feel different, and I understand that, but if it was such a problem to him then ask me to move to be with him.  I have no friends no family only him and my children to talk too, no quality of life anymore and it doesn't matter to him as long as he does what he wants, he goes the gym everyday with his mates socialises and I do nothing but cook and clean and occasionally have a conversation with myself in the mirror.  He says if I want to go out then I have to find a sitter, he refuses to ask his mum to sometimes babysit, I don't think he likes my 7 year old and says she acts like a baby sometimes well duhhh! He just had a downer on her and I know he doesn't like her at all. Am beginning to think I made a huge mistake coming here.  What should I do?