I just experimented with a guy

Ok, a guy just left my house after we were fooling around kissing for an hour, this is the first time i've ever experimented with a guy ever. BUT something weird happened when he started sticking his hand down my pants to give me a blowjob(this was after we had been at it for awhile), when he started sucking i simply could not get hard at all(i hadn't masturbated and had a nice hardon when i woke up this morning but i was going to save me cum for him so this obviously wasn't the reason), we tried forever to get me hard, I even went so far to imagine he was a girl, but nothing helped.. then after awhile he had to leave. I said I'm sorry and lied to him telling him that I beat off earlier and that must have been the problem.. after he was gone, i noticed that my dick had become even smaller than when he was here(it basically looked like i had just been swimming in an ice cold pool) so it begs the question, could this possibly be a sign that I'm simply not gay? I figured I'd ask here since your all faggots.

tldr; A guy couldn't make it move, does this mean I'm not gay?