To me very frank, for me, it is really not easy to recover from broken heart.
Broken heart is not only stand for people who break out. Sometime, if you really love with someone, you put effort a lot but result don't pay. This is absolutely breaking your heart also.
Relationship problem, is not easy to recover.
Many people suggest a lot of ways to forget him/her. But I don't think is too easy, because no matter how, you must have resting time. The bad feeling will attacking during when you are driving, bathing or even on the bed when you gotta sleep.
Just the most important things is stay positive. Not to be too negative if you got failure in relationship. Trust yourself you are a nice guy/girl and someone will love in you next time.
Sometime, he/she will comeback in your mind also because you feel lonely. Even it was a failure relationship, even you don't wish to see him/her, I'm sure you still hope he/she can accompany you when you are lonely. You will remind yourself back the previous happiness moment. Although it was painful, but you still enjoy the pain. I think this is normal. I guess, usually people will only forget his/her ex after times or get in new relationship.
Although I'm sharing my opinion here, but I don't know what I'm writing about. So if you can't understand me, is normal.