My FP I'll call him "D" has his own FP "R" but they've basically stopped being friends due to D breaking boundaries, excessive venting, and overall obsessiveness. It's been almost a year since they stopped talking, but recently D has been thinking about sending a birthday message to R and I'm afraid that they'll get back together and that D will no longer talk to me as much as he does now :( 

This is a very real fear of mines and I feel extremely selfish for even feeling this way... I just really love D and all of the moments we have together and I don't want him to become distant with me because he has his FP back into his life. What do you guys think I should do? Am I being selfish or irrational? Honestly just thinking about that possible outcome makes me happy for him but also depressed for myself. 

It's kind of funny in a way because D's favorite person is R and my favorite person is D so it's just a weird line I guess lol I always wish to be someone else's favorite but it's never happened and it probably won't.