Asked a girl I had been friendly with to prom junior year of high school.

Took her to a nice dinner on a double date with one of my "friends."

Well at dinner, we got sat at this round corner booth and she and my "friend" sat next to each other in the middle, with his date and my self on the outsides. They ended up just talking to each other the whole time, really not paying any attention to myself or the other girl there.

We go to the prom, where after what must've been a single pity dance with me and then she spent the rest of the night grinding up on my "friend" on the dance floor.

I had been so proud to save up money from my part time job for this too, and even paid for our tickets and our seats on a shared limo ride with a group of friends. Not to say I was expecting anything in return just because I paid, but her never speaking to me again was pretty brutal lol

Bonus round: In college, a girl I had been talking to for a semester, went on a few dates, slept over at each other's dorm a few times. End of the semester comes around coinciding with the end of a semester long pledge process I was doing for a fraternity. The night of our initiation there is a party to celebrate, this girl I had been seeing waa invited. Midday through the party Im a bit drunk and just socializing with everyone, I guess high off the so momentous "accomplishment " and I realize I had lost track of her.

Someone says they saw her go up stairs, I find my pledge brother and her buck naked having sex on the floor, didnt even bother to close the door on the bedroom lol. My Pledge brother, who knows ive been seeing this girl, looks me in the eye, keeps stroking and without missing a beat, gives me that "welp, you caught me... sorry?" Look and them asks me to close the door so they could finish.

Man, I've sure had some great friends haha