<human>: My boyfriend and I have been together for 5 years now.  We live together and overall, our relationship has been pretty rosey.

My guy is a huge gamer, which I support.  After all, we met on a game ourselves!  Lately I've started to grow jealous of BF's relationship with a female guildmate of his.  The guildmate is in a relationship herself, and my boyfriend said she often comes to him for advice regarding her relationship.  My boyfriend said her partner was 'controlling' and didn't like the time my boyfriend was spending with her.  So he felt like a big brother to her.

Basically, I found out he's been waking up 3 hours earlier than usual (including his days off) in order to talk with her because of timezone differences.

Today, they had taken in-game pictures with one another, almost romantic looking (their characters were close and looking at one another).  They wanted to draw out their characters and send each other their completed creations.

When I first confronted my BF about it, he claimed it was platonic and she was like a 'sister' to him.  He said he woke up early to have time for himself and to work out (he worked out only 2 of those days).

This afternoon, I found out that not only had they been talking on the game, but had exchanged Skypes with real-life pictures.  On the Skype display picture was a picture of my boyfriend in his best work clothing (a picture he made me take a few days ago - for week apparently!) and a picture of his blonde guildmate.

I am beyond furious right now.  I confronted my boyfriend about it and he seemed very guilty and that I have every right to be upset about it.  When I said that I felt he had feelings for her, he was silent.  Basically my suspicion was right.  He's out right now, but I want to know what to say to him when he gets back.

Condense the text into a few key points
<bot>: My boyfriend has gotten very close to a female guildmate and has admitted he has a crush on her.  He wants to know how he can change his behaviour because he wants to right his wrong.