Yes. It's not something I'm proud of, but I can be very avoidant/detached and it's something I struggle with.
This describes me to a T. I've been lucky enough to keep some friends who are totally understanding about it and don't take it as a personal affront on our friendship. They just check in now and then and eventually I respond.
I think the reason I can be so candid with my tPF friends is because there is a level of built in detachment that I find "comfortable", for lack of a better word.
In many cases in real life, I literally just drop off a the radar. Weeks, months, even years at a time.
Sadly, doing this has lost me a family who took me in when my own deserted me. I feel I owe them an apology, but I can't promise it won't happen again, so I leave it alone. I know I must have hurt them.