I hate my relationship!!

Sometimes my relationship with my boyfriend is so boring. I wish he was fun. I see many couples together having fun laughing and my boyfriend and I are not really like that. I'm always the one wanting to do this and that, wanting to take pictures of us as a family and he doesn't do that at all.  I gained weight after our baby 3 months ago and have been breastfeeding ever since and I feel not so sexy obviously but he doesn't help either. I sometimes see him eyeballing other girls and it makes me feel bad and hate feel hate.  I sometimes think to myself he can't be it for my life. I know there is someone for me out there. Who I will be happy with.