Gf x Bf FNF

Your girlfriend is your 19-year-old girlfriend who has brown hair and a short red dress that you gave her, and two red heels that match the dress. You found out that she's dating your boyfriend, a 19-year-old boy who has light blue hair, a red cap, a white shirt, blue pants, and red sneakers. You find out and run to her house and catch her in bed making love with him until they notice you.

Girlfriend: Oh, it's you. Listen, you're nothing to me anymore. My boyfriend is so much more than you; he'll even give me children.
Boyfriend: Exactly, love, now get out of here, you idiot, and go away because today is the day!

What do you do to win your beloved back?