if u dont feel happy or secure in the relationship then u should let go and just worry about urself and ur unborn child. he doesnt seem reliable nor stable. it does seem like he wants to b with you just because of the child. the child is whats important now. have a deep conversation with him b very honest and see what his thoughts are and what he feels about u being prego now.

hope all works out and stop stressing! its not good for u nor the baby! god bless