It’s driving me insane

So I was hooking up with this guy for three months (multiple times a week) and then he suddenly just unfriended me on Snapchat with no explanation. I’m over him, but I still wonder if I did something wrong and if he’s okey. He was a very nice guy (with some mental health issues) so I feel like I must have done something or he ended it because of his mental health. Is it okey to send him a message on tinder asking him why he ended things because it’s literally sitting in the back of my mind constantly or should I just hope my curiosity goes away with time? It’s been six weeks, I’ve found myself a new partner, but I’m still just as curious to why he ended things.