Most Helpful Guy
She is interested because he was with you. He obviously has been after her attention for a long time and when he finally gave up and got with you she became more interested in him. It will fizzle out in a while I think because she doesn't see him that way as you've said. Best you can do is move on from him. A guy who can do that is weak and will always be a puppy to this girl. Do you really want someone who is like that?
Most Helpful Girl
I don't know your relationship, but sounds like that gir is jst there for the friendship where she's admired... As for you - what does he mean by moody?