Should I compromise on marriage to be with my boyfriend?

So I’ve been seeing someone for a few months and I have 2 daughters from a previous relationship (he has 3 kids from a previous marriage). He adores them, they love him and everything has been great. The only downside had been that he travels for work up until a couple nights ago. I don’t want to be with anyone else and he makes me feel so appreciated and loved, but I just found out he doesn’t ever want to get married again. I want another baby someday and he says he is up for that, just not getting married. I’ve never gotten married and always wanted to eventually with the right person, especially before I have another baby. Do I compromise on something I’ve wanted my whole life? Is there any way he may change his mind about marriage in the future? Do I take that chance knowing we might have an expiration date? Help