Definition: In this task, you are given a Reddit post as a text. Your task is to generate a title for this text. The title should start with "TIFU by", followed by a situation that caused humor. The title should contain 7-12 words, ideally.
Input: Text: i'm a high school senior. in junior year, as i struggled with the workload of ap/ib classes that i probably shouldn't have been in, i knew a beautiful redhead who kept trying to befriend me. being the permavirgin workhorse that i am, i was too distracted to realize some of the obvious signs. only when it was too late did i commence cyber-stalking her and fantasizing about a relationship.

the girl, let's call her "hulk," left to attend classes at a local community college for her senior year, although she stayed in contact with her old classmates for the first weeks at the beginning of senior year. after a few months, though, and only after i had realized how much of a doofus i had been to blow her off so easily and let such a once-in-a-lifetime chance of friendship slip away from me, she faded away from my thoughts and life went back to being a monotonous, empty void. (hurray for reddit!)

a few hours ago, i was logging into a virtual school class in the computer room at my school when, out of nowhere, i felt two arms wrapping around my neck in a weird bear-hug. thinking it was a friend of mine who likes to troll me by making me look powerless in front of others, i followed my instinct and rammed the back of my head into the unseen person's face.

i turned around with a smug smile and then heard, "ah!" sort of like peter griffin after falling down the stairs.

fuck! 

it was hulk, the last person on earth i expected to be behind me at this moment on such a boring, ordinary day.

my initial shock at seeing her turned to embarrassment and revulsion as i helped her find a chair and apologized profusely. she kind of gagged and closed her eyes for a moment, but she was still happy to see me. she had sneaked into school (without a visitor's pass) to greet her friends and some of her old teachers. we had a brief conversation, hugged, and then she waited for a few minutes for her headache to wear away and her senses to return before leaving.

TIFU by head-butting the girl I like