Got it bad ?

I know I'm in a relationship and we live together but sometimes I can't help but to reminisce on the past... My ex boyfriend is locked up and I always imagine how things would be if I gave him a chance when he's out its a scary decision because it can either make or break us... I just want to start a family and be happy with one man and I can't help but to wonder, it makes me feel guilty because we were supposed to be together and now here I am with someone new but I can't give my all cause I feel guilty in a way.... I just want to make the right choice I don't wanna lose out on a good man 😓