Exactly, consent is just about that and guess what it flows the same way in return.

If you feel with a past partner, friend, intimate lover, etc, that a drift is happening. You ask, you talk, and if it is drifting apart , you respect the person and you walk away and respect the boundary.

Does it hurt? Abso fucking lutily (my made up word patent pending).

Anything shared nude wise, or other aspects is actually no longer yours. Do yourself and the partner a failure and nuke it.

Why? It saves you future pain, and respects the person's privacy. Now if they live the life a thirst trap, there maybe some grayness, here, but they are never for you to share ever ...

What was golden or if it was transactional play, has guidelines and agreements.

One can still remain friends and even be close, but if the friendship is to be maintained, give it space.

Be an adult. If transactional there should be no emotion, if there is emotion then therapy or find someone to talk too. If a relationship, mourn and do what you need. Hopefully don't hate, because if you do ... you really didn't care or love them .... you just loved the throught of a relationship or the aura of their phsical being or something transactionally they offered you ...