That's called having your cake and eat it too. Somebody already mention the infamous qoute" beta buxxx".
But THIS is the whole point of the thread imo. A man might get to be her feckboy,still he will feel some type of way because the OTHER guy has access to thing he womt get from her( love ,affection, attention, care ect).
Now everyone can frown upon OP and tell him he should "just be happy" , but that's not how it works. At the end of it all most of us wanna be loved.
So who won? Other dude is dead, you will never be able to " claim victory " over him. He allowed her to fock other men, and got the love he needed somehow. OP on the other hand had to watch from the side, as a substitute player who every now and then gets to play the last 5 minutes of the game.