elena has obviously been through a lot and now its time for her to make a big decision: choose between Damon and Stefan. We know she has feelings for both but now the pressure is on for her to pick one ou the other to be all lovey dovey with.
Or…actually, he will be the one that stays gone. I predicted before that Damon would make the choice for Elena. I stand par that. He will tell Stefan to go back without him and be happy with Elena. He will do this because he loves them both