4. Spread Too Thin
Did you know that recently, Spider-Man was a member of the New Avengers and the Future Foundation simultaneously? How did that leave any time for his solo adventures, his team-up tendencies in Avenging Spider-Man, his exploits as a Secret Avenger, his full-time job at Horizon Labs, and any semblance of a personal life? No wonder poor Peter is so unlucky at love. He simply doesn't have the time to care.
3. Too Many Love Interests
Since ripping Peter and Mary Jane apart in egregious fashion, Peter has been romantically linked with Ms. Marvel, Black Cat (again), NYPD forensic specialist Carly Cooper, criminal defense lawyer Michele Gonzales, and fellow Empire State University student Debra Whitman. Really, Marvel? Eggheads don't have such a full dance card; not even superpowered ones. Clean this up, please.