You'll Stay With Me-SwanQueen
After discovering Robin gave her up for Marian/Zelena, a heartbroken Regina goes back to Storybrooke without trying to pursue a relationship with Robin.
Regina won't talk to or see anyone after the event, but something inside her tells her to let Emma in.
Emma and Regina go through ups and downs, and both realize that they may have feelings for each other.
But no matter what happens, they know that they'll alway stay with each other.