I can't believe it's so common but I was dumped hideously years ago.
Had a year long LDR with a guy who decided to move to London. He found a job, flatshare and was going to college. We had a holiday booked, were planning to look for a flat together. He walked me to station after a perfect night (wonderful sex, lots of intimacy and "I love you's"). He kissed me goodbye, told me once again he loved me and that was it. Never saw him again!! He'd been on London for best part of a year, never mentioned any issues. He had friends here, had built a life? And he just left it all.
He did at least have the decency to call me [on my work phone!!] to tell me he hated London, was going home and had bagged up my stuff which I could collect from his flatmate
. No real apology, no mention of going back to LDR, no real choice on my part. He was done.
I sat at my desk in a state of shock and got the delightful follow up text "sorry Crunchy, just to avoid any future aggro I'm not going to use this number going forwards and please don't turn up at my parents as I have younger siblings to think of" he obviously knew I would have torn him a new arsehole so was pre-empting me!!! I'd invested two years of my life with him and lost the holiday to boot.
This was before smart phones and social media and despite what he thought of me I didn't travel several hundred miles to harass him and his family!!
I did drive myself a bit batty by periodically trying his mobile number for some time after and it was always off #notproud
The lack of closure did really get under my skin but this was almost 20 years ago now and I have had a very happy life, no lasting damage (have been with lovely DP for well over a decade now!!)
Do not message or call him.