advice needed

I am almost five months pregnant. I have been with my boyfriend for almost three years. Before we started dating he had been in a relationship with a girl for four years. Since, she moved on and is getting married to another man. Occasionally I still see my boyfriend looking up on her on social media. It makes me feel like he still has feelings for her (she was his first love) even though I know there has been no communication between them. Our relationship has been really rocky since the beginning but I stuck it out and worked though things because I do love him. I had been with other men before him but he really is has been my first love. I tells me he loves me and has done some really amazing things for me. But for the past year or so he will not do anything I want to do. Even as simple as taking the dog for a walk because he doesn't like it. I asked him the other day if he would go ballroom dancing with me. He told me no, he didn't like it. He tried it with his ex and it wasn't for him. I fell like he made all these sacrifices and treated his ex so much better than he did me. I tried to bring it up nicely that I was hurt and he brushed it off. I then just lost it and brought up his ex and said how he treated her and cared about her so much more then he has for me and he told me "then go find someone else" I'm at a lost for words and so emotional.