Why do I fantasize about my boyfriend with other women?

You "get off" on rejection anxiety. When you fantasize about your bf with other women, do you get a "erflies" feeling in the middle of your chest and an intense feeling of pion for him? It's a similar sensation for a man when he fantasizes that his girlfriend has been cheating on him. Stirs a lot of pion. You are neither weird, nor alone in doing this.