To help me get through those times of intense longing, I "play the tape all the way through" and imagine what we would talk about if we were to be in contact. Yes, there would be good conversation but in the end, the impasse between us would still be there, and the conversation would no doubt leave me sad about not being able to change things. Doing this helps me snap out of it a bit; I realize that I miss being in love, I miss having someone be concerned about me, and I miss sharing our lives, but I also realize that I don't miss knowing that he just doesn't have the emotional maturity to be my partner.
And then I have chocolate. Lots of it.