He has no interest in sex

My boyfriend and I ( I am 37 & he is 38 ) have been together for 6 1/2 years. In the last 2 years we have had sex maybe twice and it didn’t last but maybe 3-5 minutes max. I don’t know how to deal with this. I’ve tried to bring it up but it turns out that’s a big problem. He’s never liked for me to initiate so there’s no room for me to even attempt to get him in the mood or even get him to thinking about sex . I am an open person and I can handle truth well. I’d rather someone be brutally honest with me instead of being left in the dark to wonder wtf.
I could understand if he was stressed over bills or overwork due to a demanding job or whatever but he doesn’t even continuously hold a job. His days consist of Xbox and making YouTube videos. Hell he doesn’t even sleep next to me or try to spend any time with me. HELP ME UNDERSTAND !!!! I’m to a point of resentment and walking away.