I need help

So like Me and my bf had 6 months together but broke up and now we got back and started all over and he is growing as a person and learning and being and better bf , he told wants to be like a forever with me and grow together and build a future, my bf has a kid his baby mama wasn’t in the picture and now she is idk honestly how to feel about that and we both are 20 I really like him but idk how I would know if he’s the one for me how does one know I don’t mind about the kid honestly the thing is baby mama doesn’t like me because he says cus I think I’m pretty and get all the guys which is a stupid reason to hate anyone but I just don’t want drama ugh I’m so confused help