ok, so he's not exactly handling this in the best of ways, he came here for help I'm assuming, so let's avoid bashing, mmk?
I agree with what most have said though, sounds like she isn't satisfying whatever desire you have in the relationship. maybe she looked good on paper, but after being in a relationship with her she just isn't the one for you. maybe you aren't getting laid enough, I dunno, but you either need to figure it out or spare her the misery of HER trying to figure it out
