Hey :D Sorry for the late response! Summer just started for me, and I’m back.
I was in this same situation :( It sucks. Getting over exs is really difficult, especially in the way you’re describing it to me. What I don’t understand is why he broke up with you just because of one time where you flirted…Maybe he has other reasons? You loved him with all of your heart, and he still broke up with you.
Some men love to be chased…It’s our way of finding out if a girl really cares. Maybe that’s what he wanted you to do. Or maybe not. You know him, think like him. Another piece of advice…do what your heart tells you, not your mind…I learned that the hard way, and it took me awhile to find out I was wrong. Take a week to try and forget about it. If after that time you still feel the need to chase him, then try talking to him again. Pursue him :)