<human>: It's not what you may think however. Video games are incredibly important to both of us. However lately his frustration with the games and rage at other players is really getting to me. It's more of a terrible negativity than yelling but that also happens. He only sometimes raises his voice at me. I'm a rather sensitive girl and I really dislike being around people who are incredibly upset. 
I still want to play games with him and continue our relationship. I do not feel that there are any significant issues outside of this. The one possible exception being a general reserved nature in which he does not want to talk about the things that bother him.
I would hate to lose my relationship over video games because I plan to play them my entire life. His behavior has caused me significant distress. I have mentioned this to him but he believes it is my misunderstanding. Some of our mutual friends have also observed his increased frustration and have also tried talking to him gently to no avail. I am thinking of having an intervention but I do not know if that is the best recourse.

Condense the text into a few key points
<bot>: Video games are causing frustration in the boyfriend that seem outside of simple nerdrage. Friends are also upset by this behavior. What do?