Does anyone else hold onto minor things people say or do? Even when it's tiny things?

After the monumental amount of emotional abuse and manipulation from so many people I always try to be fully aware of others actions and the words they say.

I don't trust anyone anymore so I constantly am on guard. There are so many memories of those things. (I also have a lot of health issues and am an anomaly so I'm in studies lol I still have to live with my mom though)

I remember after getting out of a mental health hospital years ago my mom said "Things were so nice and relaxing when you weren't here." but when I confronted her a few days ago about it she just said "that was years ago, why are you holding onto shit like that?!".

There are so many other things as well. Some of them are more minor. They just make excuses for them.

Am I being irrational for holding onto those kinds of memories? There are so many more as well of course but that would be a lot to read.