BF w/ low-zero sex drive, among over things...

So my boyfriend and I have been sleeping together for over 2 yrs now and recently decided to try dating after all this time and confessed feelings. The sex is good but for the past 2 months or so there has been little sex (two weeks at a time w/o sex). I finally lost it the other night when i tried initiating sex and he turned me down. He finally confessed he has no sex drive really and doesnt even masturbate anymore (which is a norm for him), asked why I even wanted to have sex because it doesnt last long anyway, etc. I got mad and petty and brought up some shit from the past about how it didnt matter to him if he lasted 5mins with previous women so why would it matter with me. Thats when he told me he only lasts a short amount a time with me. I have no idea how to take that. I asked him various reasons, including if he wasnt attracted to me, etc. Any ideas on how to fix this? Advice to why he said what he said? Anything helps! Thanks!