I swear social media is going to be the downfall of mankind sometimes,

Im sorry that she has pulled away and not given you a reason its all very hard to handle. I seem to have friends (online) around the world .. But it took along time( think 6 months to a year) for me to feel that it was indeed a long term friendship.. Friendship takes time.

I would not reach out to her again, Just let it go, if she contacts you again maybe you can find out what really happened or maybe you will never know..

This has been a good learning expierence tho.. Dont become to emotionally attached to someone on line so quickly .

Good luck