First Time Bottoming For Bear (Vivid Detail)

I am an ordinary student, a little late on his studies, a little after his 24th birthday. I am gonna go ahead and say that this is going to be a long story, due to its character of being as describing as I can make it be, which is the level of reality.
I always identified publicly as a straight guy, except for four or five people, one of which was the physical proof of me not being one.
The story about him is not a particularly good one; the only thing you gotta keep in mind is that it involved me and him blowing each other a couple of times and one try to step things further. Although he enjoyed blowing and swallowing and letting me do the same, he was not bi-sexual, like me, as I was coming to realize at that time.
So, we could never step things further enough. He could not achieve a decent erection or the excitation to do so, thus the failure. When we discussed more than two times casually that matter, he said he liked my body, but it didn’t change the fact that it was a man’s body, and that stopped him.
I have an average body, except from the fact that I’m shorter than average, about 5.5ft. However, I am slim even for my height, with narrower-than-I-would-like shoulders, but a good physique, due to my close relationship with the bicycle. I won’t claim I am muscular guy, although sometimes I’d like to be. Just fit and generally kinda small.
Although our fiddling around with that friend made me confirm that I was bi and I would like to bottom some time in my life, it also gave me a lust of doing so. I had a relationship with a girl since, and my sex life...