Will mindfulness help me in observing patterns and learning to keep away from a toxic person?

I have started mindfulness from past 3 days and am experiencing reduced anxiety. I have allocated a half an hour time at 9 PM to reflect on the thoughts which may have occurred to me during the day time. So, during the day time I do NOT dwell on the past emotions. I question myself is there a problem to be solved or the thought is only about feeling bad or good. If there is a problem to be solved, then I solve it otherwise I list the thought in a diary to reflect on it in the night. Since mindfulness is always about being in present, my fear is that with this attitude I may forget how the person x behaved with me in the past and I may allow the bad/toxic behavior to continue. I want to learn from the past mistakes, I also want to remember what wrongs did the person x do to me - is there a pattern in them, so that I keep that toxic person away from me. **Will mindfulness help or allow me to recognize patterns and learn from them?**