CATASTROPHE?

Ok, so this guy and I have liked eachother for a long time. and we've done everything but . So recently i went to give him a ******* and he couldnt get hard. we dryhumped for quite a while and i was in a thong and things were getting pretty serious...but he just couldnt get hard. HELP...is this no big deal?is he not attracted to me? should i end things?what do i say to him?