I was sure that's what you meant, but wanted to be sure.
I totally appreciate all the reasons at 15 you'd be attracted to a 25 year old. But as a 25 year old - particularly a 25 year old parent, as he was when he met you - a 15.year old is a child.
Though it's sounds like of the two of you it's HIM who needs to grow up.
I think if you got away - found yourself as an adult without him you'd never look back.