Please look after yourself. We'll always be here for you if you ever want to come back. I can't claim to have been in the exact same place as you, or know how it feels to be you, but I do wish you the best.
If you ever need to talk, I'll put it out there and say I'm more than willing to. You don't need to take me up on that of course, I'm not sure we've ever actually talked before. But the offer stands.
Good luck.