Undecided

So we both have a child from past relationships and now he says he want one with me but we been trying and it hasn’t happened. I believe we not meant to have a child together cause he is very unsure about me because of the women he has dealt with before me. Ive tried to prove I’m not like them. I not here to use him or cheat on him. I’m not sure if we should even be trying to have a baby