Really? Are you serious?
That just sounds so crazy to me. If he hasn't gotten an erection...after 6 monthes....that's crazy. He probably has some kind of erectile dysfunction. I know that my boyfriend would get erections just from cuddling, before we became sexually active at all. And it sounds as though you are teenage, meaning that he should be at his peak of horny-ness, so to speak. Ask him what the problem is? Cause trust me, that isn't normal.