What about like if someone is always bringing the past up in arguments all the time sibling stuff she still has resentment on issues in our child hood kind of brings it up often but some things i cant answer because i dont know why.

You just do, thinking about it won't change it. Apologies won't either. Dwelling on it doesn't help anyone and makes you feel crap

Yes, as long as you don't repeat it. 1st time is a mistake, 2nd its choice.

Yeah. I don't think I'll ever get over it. Just another thing to deal with on a daily basis

meditate then hypnotize then give up all worries and live happy with pretty smile :)