Love confused

I need advice . Please. This will be long but I need honest truth from y’all 🙏🏼

I was dating well with a guy and stayed with him a week when I got let go from my job only because my family I was living with was out of town. Any who he showed me how a man is suppose to treat a woman and was so amazing to me. Him and I just clicked so well . Shopping to laundry just everything we never fought. Well I went with him to Louisiana to meet his dad and step mom every thing went good. We came back . He’s a marine so he in one week lost 3 people that was close to him from suicide so he had a hard time coping . Well he ended up pretty much ghosting me I told him I loved him and if he needed space I would give it to him so I did . Well I told him I would wait for him and I did . Well I ended up in a relationship, the guy I’m with now is a great guy he wants to marry me already and this would be his 3rd marriage . I love his girls and they love me but him and I are just completely different completely. We don’t really talk about much and he’s a sweet heart but it’s hard we don’t see each other he makes sure to see me at least once a week. So how the marine wants to be with me BUT the problem is also he doesn’t want any more kids he has a boy and girl 14 and 9 I want kids but I have problems getting pregnant so what do I do? I want a baby so bad but i do love this man and could have a wonderful life but just without having my dream to have a baby. What do I do? Do I be with someone I love and not have a baby ? Do i stay with someone I know I don’t really belong with ?