2 1/2 more months and..

sometimes i feel like i should be on my own on this... I don't feel a lot of support from my SO, he has a very high temper that stresses me out every time , we can't go out without him having problems with his stupid baby mother and then he is all stressed on me and we can't even have a normal date, we didn't even celebrated our anniversary because she wanted him to take care of the girl because she was "sick" and valentines day also she was "tired from work" seriously they were our days! to spend together and bound but is like she controls him with the little girl.... he hasn't even buy a single thing for our baby... not even a single sock!! i am buying everything myself and having to deal with his attitude?? might as well be on my own, i know he loves us and there are times where we have a good time and bound but probably that's like 30% of the time... i just don't know what to do anymore...