In my experience, any guy that HAS a girlfriend (even if he doesn't want to be with her) and is willing to leave her at some point for someone else... He will probably end up doing it to you.

And besides, if he doesn't want to be with her bad enough he wouldn't hide the two of you hanging out and being "friends".. And he doesn't have to "kick her to the curb". They could remain friends, and he could help her in any way that she needed.

I think there is more to the story than he is telling you.