I did this in high school with my first ~~boyfriend~~ little friend. He was taking an exam over the summer or something and losing his shit. We had been having problems and I was so ready to get out, he actually told me "I wont pass this exam if you leave me. Promise you will stay forever" because emotional manipulation is high schoolers do.  So I promised so he would pass and roughly the minute he was done I broke up with him, and que "you promised!" Dating in high school was such a joke.