<human>: Summarize the given text in a few sentences.

My girlfriend of two years met a boy a few months ago on an MMORPG. WE were both avid gamers so I tried to get her into it so we'd have something fun to do when we weren't together. She decided to start hardcore role-playing with other people and stopped playing with me, so I eventually just stopped playing. After a while she started getting way more involved, which made me nervous.

She met this boy and started to talk to him outside of the game and for a while was all she would talk about. as time progressed I learned more about this guy and learned that he is extremely depressed, has attachment issues, and isn't as shy as he leads on.

After about a month we were hanging out and he sends her a text of himself cutting, and makes my girlfriend cry and stress for several days.Now shes getting more intimate with this guy. Now she wont talk with me about anything emotional, and says she has complicated feelings, because she says that he relates to her better, but then tells me she still loves me and doesn't want things to change. After reading a few sexual-esque texts between the two I'm starting to doubt the sincerity.
<bot>: Girlfriend met a guy online, is getting more serious then I find is comfortable, wondering what to do. I don't wan't to be a jerk and ruin her friendship if its nothing.