To me it sounds like she's missing the intimacy you two have and seen as though you two are not close (distance wise) she is looking for these friendships to fill that gap. It sounds like you are investing a lot in this relationship and yes you may love her and I am not contesting that, but you need to care about other people too, have other relationships (friendships with people).

Listen to her, believe and trust her when she says she loves you and still wants to be with you. If you don't trust her, that is how you risk loosing her.

I hope you don't mind me asking, it just makes it easier to understand. How far apart are you distance wise? and do you see each other often?

Trust her take care