Hey, I know it's tough right now, but it sounds like this might have been a blessing in disguise. The kind of just-below-the-surface resentment you're describing is absolutely TOXIC to the soul. Open conflict is at least probably going to lead to some sort of final resolution, either reconciliation or total breakup of the friendship. If it means a breakup, you can finally start to heal.

Please try and get some sleep if you can. I know from recent personal experience that sleep deprivation warps your perception of the world.