Why can't my boyfriend have an orgasm?

I have been dating my boyfriend for a few months and he has never cum from me giving him a blowjob. We haven't had sex but he said he hardly ever came from sex and only twice from a blowjob in his previous relationships. At first I thought it was just...

because he took a long time to finish, but I gave him a blowjob for almost 2 hours and still nothing happened. Is there something wrong with him or is there something I can do to help him?

You obviously tried, there is nothing wrong with u and u can help it. It seems that it possibly can be a psychological problem that can stem from a conservative upbringing or an unhealthy attitude towards sex and masturbation especially at a young age. He needs to confront the issue, and if possible, try kinky things to get him excited, and if that doesn't work, get him medical attention.
Good luck

well, first you both need to be comfortable with eachother, enough so that you can ask him what you can do that will help, and he can comfortably answer. plus, since it does take so long, be sure that he is lying or sitting, that way his legs dont get tired. then, i know your mouth gets tired, whatever you do DONT STOP. when you are doing it, jack him off with your hand at the same time, just make sure that there is enough sliva to where its wet and slippery. this way ,if your jaw gets tired you can relax your mouth without ever breaking stride because your hand is already there, and in motion. plus it helps to gently play with his balls with your other hand. let me know if this helps God i hope your old enough to be doing this