A: Why have you guys all found a nice girlfriend and I only have brief flings?

B: You keep moaning that you don’t have any meaningful relationships, but you don’t do anything to try to form one. Either put up or shut up!

Note: If you say that someone should put up or shut up, you mean that they should either do something about a situation they are complaining about or stop complaining about it. Originally, to “put up (money) or shut up” is what one boxer tells another after the latter has again and again refused to take up an offer for a fight for money. Back in the day, boxers fought with their bare hands and almost always fought for money.