Dotting the “I” in bi

I looked at Dave a few times, but if he had at all been distracted or thinking about yesterday, he sure hid it well. It was a tough day for me. By the time the final bell rang, my head was buzzing, and my balls were soar again from the half-erection I’d been having all day.
While everyone hurried off for home, I decided to go to the toilet to give myself some relief before getting on my bike. Bike rides and unrelenting boners don’t mix well.

The toilet building was empty. I entered a booth at the far side, but before I could close it behind me, the door opened and Dave pushed in, pinned me against the wall with his body and locked the door behind him.
I was surprised and exhilarated at the same time. I hadn’t expected this at all, but the prospect of sucking his cock again almost overwhelmed me. I was prepared for anything, for letting him forcefully fuck my mouth again, and let him shoot his delicious cum all over me. But instead of letting me sit on the lid, and open his pants, he grabbed me by the collar with both hands and almost lifted me off the floor.
“Look, I don’t know what you think happened yesterday, but it was nothing, OK! If you ever as much as hint at it to anyone, I swear I will…”
“You will what?!” My audacity surprised him, as well as myself. He had always been stronger than me, and a lot meaner. Although I considered him my friend, I’m sure to him I was just an annoying run-along, a legacy from his childhood that he was now stuck with, despite himself. He would act amicably enough when we were alone, but as soon as a third person showed up, it was like some primitive instinct got the better of him, making him try to assert himself over me every time. I hated him for it, but I was also desperate for acceptance and belonging. So I usually tolerated his wims. But I never let him dominate me without putting up a fight.