my gf and i first got together 'bout 6 months ago, when she went with me after she saw how we got along, and we thought we had a connection (more things in common, similar interests) better than with her ex, she thought about dumping him, it started out as a friendship, and when she got dumped by HIM for a stupid reason, we got together (i was not her rebound). But then she moved to a different state, and we remained in contact for a while, but since then she's been contacting me less, at first i thought she was just busy, but then her best friend comes up to me and says "yeah she and her ex are back together and shes just using you, she told me last week and whenever you ask her if it's true she's just lying to you", and her friend just doesnt seem the kind of type to lie (although her friend doesnt really seem to like me) what do i do?