Do dreams mean anything?

My mom and I didn’t have a good relationship at all since the time I was 7-16. I can’t really remember her being in my life before I was 7 so that’s why I say 7. I know she was, but I don’t remember her or really anyone besides like, 2 people and I think that’s just a case of childhood amnesia and not some sort of trauma. But during those 9 years she put me through a LOT of trauma. I hate to admit, but I hated her. I wanted her gone and I was so angry at her. Well I’m 20 now and we have a good relationship and I thought all that anger from my childhood was gone, at least the anger I felt towards her, but I just woke up from a dream where I told her I hated her. We got into an argument and I told her I had hated her since I was a kid. I don’t know how to feel about that tbh. I don’t know if that’s still how I feel or what? Do you think it meant anything?