Help understanding recent dreams about past friends

I've been having strange dreams for the last few weeks that are messing with my head and I just wanted to ask if anyone here has any ideas about their meaning.

Every night for the better part of the last month I've had a vivid dream about a different friend or pair of friends from the distant past -- new people every single night. These aren't people I ever even think about anymore, and I haven't seen any reminders recently. The dreams are all extremely positive and that's what makes them unrealistic. We are reconnecting and having fun. They are kind and welcoming.

They are all people I've lost contact with for a reason. Mostly people that were bad friends to me that I would be happy to reconciliate with if they were to reach out to me but I know they never will (and I have the self respect not to reach out to them). Last night was an old friend that was responsible for the death of one of my best friends, so he's not even someone I would even want to reconciliate with if he did reach out (which again, he wouldn't).

These dreams all just feel so themed and intentional. I can't understand the purpose of it. Is my brain just trying to heal by putting a nice bow on all my bad memories? If so, I'm confused as to why now as nothing at all has sparked it, at least that I can think of.