If you count being cheated on and dumping the person as being dumped first ('cause it is), I've been dumped three times. Caught a fourth gray area L somewhere too.
Once by one of the early teenage girlfriends because dude had a car , money, and was older. Funny thing was he ended up beating her ass for years to come and she couldn't even face me later on in high school.
Another one because I confused fucking for a relationship. This one kinda fucked me up because we grew up together, started smashing around 6th grade (overlapping the above chick dumping me). I got fat and lost my athleticism, so she was the shining spot and niggas tried to front on me about not fucking and I was like, "Me and A been getting it in since..." and she proceeded to cut my head off in the hall. "I don't fuck fat niggas! Hell naw!" Came and tapped on my window as usual that night and I resumed fat creeping partner status until she got pregnant by another dude and quit talking to me despite riding the same bus for another year before I left public school.
Third L came when a chick I put through hair school asked me to check her email for her and an app she used sent a transcript of a message she had to an ex FWB was sitting there asking why they could never be in a relationship as the subject line. Keep in mind the shit was years done with them supposedly, and she'd just sent the message a month or two prior. Deaded that through a text.
Fourth L (semi because we didn't label shit), she just moved away on some bill collector shit. We smashed and what not on the regular all summer, talked late night outside or whatever. Then one night, I went downstairs to her apartment as was the routine and poof: Gone. No letter. No phone call. No furniture. Nothing. Broke down a whole apartment, disconnected phone, and disappeared on some Thanos shit.