Only with me because I’m pregnant?

So when my boyfriend and I got pregnant we were just fooling around and it happened. Well we announced the pregnancy together and I had an issue with us not actually being together so he asked me to be his eventually and has been a great boyfriend we moved in together we say I love you and we are so close. But before I got pregnant he didn’t want a relationship with me so I can’t help but wonder if he’s only with me because I’m pregnant and he felt forced into it? I’ve talked to him about it and he doesn’t say much. Idk what to do.