I haven't had a relationship for ages and id really like someone to be there for me
You are very young and I get that he is mature and so are you and if you just want to have a friendship,there is nothing wrong with that.
Just know that you are
way ahead of him in maturity ,just by the fact that girls mature faster than boys.
I hope you are talking about only being friends as he is way to young to be thinking about *dating* in any way shape or form.