In love with older man...?

I am in love with an older man. He is 39 and I am 15. I know it sounds really bad and is looked down upon, so don't tell me all that ethical crap I already know. He was my first and only person I've ever had sex with, the problem is he lives very far away and doesn't have the money to visit me now so it is stressing our relationship. He was married once before but has no kids. I am very comfortable with him and I trust him with everything. I need help with tips to detach myself from him and move on because this relationship is not healthy for either of us. thank you!