Asked in Breakups
Is it stupid or altruistic to stick it out in a relationship because you can't live with knowing that you broke their heart?
It's misguided. You are not doing the person any favors to prolong the agony. Let them get started on picking up the pieces and getting on with their life. They will, especially if you leave them alone and don't go messing with them while they're healing.
They probably also know something is wrong, and the mismatch between what is and what seems can be more upsetting than the truth.