<human>: Can you succinctly summarize the text in 1-3 sentences?

I'll try and make this short.

We are both actors, however she just graduated. She got a job in another state acting in some shows. Great! However, in one of the shows her entire character is based around a guy, and they make out and yadda yadda in the play. This normally doesnt bother me.

However, as soon as this play began rehearsing (after the other two) she began spending a lot more time with this guy. She claims its meaningless to her, but after prying and prying for a couple weeks she relents that she thinks he could have a crush on her. He  has entered her room (after knocking) 8 out of our last 10 skype chats to she if she wanted to come out with the group. He also left his whiskey in her room, likes her old FB pictures without me in them, snapchats her, and text her, and is teaching her how to play guitar. He has a girlfriend also. She says that she always talks to him about me and how much in love we are, because they are both in long distance relationships. She says he is just a good friend. 

Also, this shouldnt mean much, but my girlfriend very, very, rarely goes on Twitter, but she started following him, meaning she searched him and added him. I feel like Othello, and have no real evidence to persecute her, but I feel so shitty about all of it, and I think she is emotionally cheating on me. One of her castmates even confirmed that they seem really flirty.

He also acted very strange when I came to visit her, and I saw almost none of him. My GF claims she feels absolutely nothing towards him, and she sees a future with me.  I want her to have friends, and i would never want to be controlling, but it makes me extremley nervous. Is she emotionally cheating on me? How should I proceed?
<bot>: GF is in other state. Kisses boy in play, spends a lot more time with him afterwards. Emotional cheating?