What do i do now?

So I came home from work today to find my partner of nearly 8 years had gone. Packed up and moved out, left me a note saying we were 'drifting apart' and he wanted to leave. He s staying with a mate in the nearby town.This is in England. So im writing this at 4 45 when I have to get up for work at 6 30 absolutely devastated. Im 61 he s 52. Im assuming its another woman. For starters he doesn't have any mates who live in the town. He s obviously been planning this for a while. Took 2 days off work which i was lied to about.( He s good at lying) hired a van and everything. I know everyone s going to say im better off without him but I feel like thats it. I was alone for 10 years before we met and I feel like I will be forever now.