Does my boyfriend like my body?

My boyfriend and I have been together for almost 5 years, and we have a 3 1/2 little girl. We have a good relationship, but once I had a baby, it seems like we don't have as much sex as we used and I feel like it's my body he doesn't want anymore...because my body image isn't as luscious as it once was...we don't fight very much...I'm 150 lbs right now, and I try to lose weight to look better for him, but I don't know what he thinks about my body...I ask him if he likes my shape, and he answers with asking me if I like my own shape....Grrrr.So I just wish I could read his mind...because if I know he likes me how I am, I would stop killing myself over trying to be thin-er...Please help me! I don't know what to think anymore.....