guilty about something
guilty at something

Do you always have to be feeling guilty about something?

I would feel guilty about other people taking care of my loved one.

Stop feeling guilty about it because you could not have stopped him.

For a while, she'd actually felt guilty about the money he'd spent on her.

Some make you feel guilty about all the time and data that have gone into them.

That, and because he still felt guilty about the other night at her place.

Even if we might be feeling a little guilty about it right now.

And I don't feel the least bit guilty about it.

I'll feel guilty about everything later and that will make it all right.

Most of the men I've known have made me feel guilty about it.