My social anxiety is just nonstop

Small rant...I wish I didn't have social anxiety. I wish I wasn't shy around so many people including acquaintances and people I actually know. I just saw someone I know at a cafe (who I wish I had the courage to talk to because I think he's actually cool) but I don't think he noticed me. The moment I recognized him I immediately turned my head and walked away. He was busy looking at something so I hope to god he didn't notice me. I keep thinking my music was on full blast so I'll just pretend I didn't see him. I picked up my order and immediately left and continued to pretend I didn't see him. I'm somewhere else now but holy s**t I instantly regret it. I can't help but avoid that interaction, I was already sweating so much even before I entered that cafe (not because of what happened) and I didn't want him to see me like that...and on top of that I just feel so awkward in general bumping into someone I don't really see or talk to. Overall it ended in more sweat and more anxety lol. I hate it...I hate it so much. That interaction and how bad my social anxiety is. It's crippling me so badly. I can't help but imagine how that interaction would've gone if I said hi and had a bit of small talk. What would come out of it? Maybe not much... but something is better than nothing, right???