how to overcome your first breakup?

He was my first boyfriend. It was a really intense love and we still love each other. We broke up in a good way. He's always been very respectful and still is. He admitted he has some drug issues and he said he feels like he's just a bad person and I'm too good for him, he always had these insecurities but he just started taking a really bad drug and just wants to "get his life together" and not drag me through hell during that.