3. When I hear that she and her new boyfriend are really in love.
“On one hand, I asked out the girl I was cheating on her with, and I was the one who broke things off, but…” said one guy. This shows that hearing an ex-girlfriend is doing well can make some guys jealous. Don’t let the breakup keep you down in the dumps for too long, and find someone new so you can show your ex a fresh face.