I know my boyfriend cares about me but i feel he isnt really "into" me or is just trying to do the right thing

I met my bf over a year ago. We hit if off right away b/c we both like to mountain bike and we like the outdoors. We had alot in comon and spent all our time together after our first date. We did alot in six months. However, i got pregnant into six months of our relationship. I was 40 and he was 49. Now im 41 and he's 50 and we have a beautiful and healthy baby girl! Its his first child. So he is ecstatic about being a dad. We do not live together and are taking our time in developing our relationship especially b/c things happened so fast. I already have 7 year old son and have been divorced for six years. Been there and done it. What worries me is that our relationship has been less for about 4 months (due to pregnancy and postpartum). I still find him attractive but often wonder what he thinks about me. I gained weight of course and need to hit the gym again once im recovered. I often feel that he is with me b/c of the baby and its the right think to do. He has high morals and is religious so i oftne wonder if he is really "into" me. He never says he loves me or shows any type of affection but he's kind and caring in so many other ways and he's an excellent father. How do i know that he is "into" me for me and not for the baby or morales? I often wonder if he is unhappy or im not his type. Has anyone ever felt this way about thier significant other?