This is exactly why I was glad Peter's married. I've always found Peter's love triangles to be pretty annoying and tedious. Probably 'cause it always turns one of the women into crazy. Betty gets all shrieking and jealous, Gwen ridiculously weepy, MJ nagging, and if I remember right Felicia seriously threatens to kill MJ a few times... I like all the Spidey ladies in their own way, so I hate seeing that happen.
The writers still treat MJ as a big nag sometimes, which annoys the hell out of me, but it's better than yet another round of Make the Current Girlfriend Crazy.