Yer, mine left me when I was at my lowest ebb and needed help. Shit happens, got a good best mate who came to stay with me for a few days when she packed her bags, got straight on tinder and out into the bars chatting to and meeting new people.
Had a new bird in just over a week, that I was banging the shit out of while I was still in the midst of moving out of the flat I had with the ex. It's how you deal with things, look yourself in the eye in the mirror and admit your mistakes and wrongdoings and improve next time.
The timing wasn't ideal, but I could've sat and moped over losing a long term girlfriend or got back on the horse, do some soul searching and self improvement. Now I'm more free and happier than ever, got a very active sex life with a smoking European girl who cooks well and who's actually up for trying things and never looks at my phone etc.