Let me start by saying we are all 17 years old with about 4 years of playing experience. me and a childhood friend started casually jamming and eventually started to form a band. we got everyone we needed,but the first guy we picked up after joining together,a rythym/lead guitarist is causing a lot of problems for the band. we would jam often and do a lot of songwriting together,until she came along. he starts to date this girl,and she is highly selfish,and just flat out ****ing crazy. she has nervous breakdowns if she cant see guitarist for a day,and the guitarist has bailed out on practice to hang with her many times. well all be going to his house,and if she cant go too because of her parents,shell threaten him with "if they come over and I don't,it's over" he hates this girl and talks **** about her all the time when shes not around,and they get in a huge fight every few days.he refuses to break up with her. me and other guitarist both have girlfriends,and its never gotten in the way of band stuff. guitarist hasnt been able to make rehearsals in over a month because of his girlfriend. his girl friend despises me and other guitarist talks **** about us when were not around. basically this girl is sabotaging the entire band relationship, and I don't know what to do. hes a hell of a player, and has written about a third of our material,but he's so blinded by poontang he can't see that this band isn't getting anywhere because of him. what can I say or do to make him stop this madness?