If I walked away from somebody who made me feel like absolute shit, am I the one to blame?

toi should have explained how toi felt, to give them some closure.

But other than that, not really

Nothing's your fault; toi should always walk away from people who make toi feel like shit because they're bad for toi and toi should surround yourself with positive people. I think toi should be straight with them now though and tell them why toi stopped hanging out with them, for closure.

toi have no obligation to be nice to someone who does nothing but hurt you.
Now, if that person does do nice things for toi once in a while, he/she may be trying to be nice but is having a hard time with it. toi should do what toi think is best, but try to think about it before toi do it.

If your relationship with someone is destructive then toi have every right to walk away. But I think toi do owe them an explanation. Just so that toi put it all behind toi and déplacer on. Even if they respond badly to what toi say, toi shouldn't feel bad about it because toi have done your best to resolve the situation.

toi should tell them the truth.... maybe they feel like its a slap in the face to them. They are wondering. Dont worry toi are not the one at fault... it would though be a good idea to tell them why toi have changed sides.?? One thing for sure toi do not need to feel guilty because that will just eat you. its human nature to change so its fine.

hell to the fucking no

No way! Why should toi stay around people who make toi feel like shit? That's only a stress booster not to mention it would be super annoying to have to face someone who always shuts toi down. But if they ask toi that again, explain why. Hopefully, they understand. And they might stop doing whatever it is that's making toi feel like shit. Sometimes, toi have to point out a flaw.