:( that's so hard! Especially a very good friend!!!
I've had challenges with close friendships with girls.. there's always something about them that prevent us from being super close and both being mutually wanting to share and meet each other etc..
Someone told me once that maybe we just have different life stages and are both busy now and I just can't expect that same attention or sharing as I used to.. but it still hurts and feels like I was let down quietly or there's something I have to do to gain that friendship.. that I have to be useful to be kept as a friend..