It's seeming to become s reoccurring theme in my life for people to leave me or stop being friends with me for a long while and then just come back unnexpectedly and I'm just supposed to be like, oh, okay. It's not necessarily a bad thing, it's just sometimes these people expect for things to go back to the way they were before they left, but the thing is that it will most likely never be that way again.  And I don't know how to restart a relationship.