Help! If I had anyone to run to I would

Stephanie
So I'm 23 weeks pregnant to the most perfect little girl i could ask for. But I do believe my relationship with my boyfriend is all over the place. Last night we had a conversation on how much he fights for me when things get rough and I had mentioned the first time I left him he only fought back because he didn't have anyone to run too. (An ex girlfriend of 5 years) and the last time we had broken up he didn't even put effort he just called his ex girlfriend and didn't fight for our relationship. He admit to it but also saying that he does what he wants and he loved me so when I went to speak to him he choose me instead of her. I feel insecure and I feel like he's with me because of the baby and not because he loves me. As much as he tells me I just don't know, I'm not sure if it's some a security. As in he hates being alone so he's just going to go back in forth. Ladies I would really like your honest opinion I eventually lost all my friends while getting pregnant and my baby to small to understand or even so give her opinion on the situation so this is from me to you. Thank you I appreciate it.