Is it sad that when someone apologises I have to think not to say I'm used to it.

Hey, I'm sorry for not answering.
Don't worry, I'm used to it.

Hey, I'm sorry for bumping into you.
It's fine, I'm used to it.

Hey, are you alright, I didn't mean to cut you.
I'm fine, I'm used to it.

Hey, I'm sorry for hurting your feelings.
Don't bother, I'm used to it.