Back in school I was dating a guy who constantly cheated on me, it was my first heartbreak so it really broke me. 8 years later, I found out that one of my closest friends at the time had been talking to and flirting with him behind my back while pretending to be my friend back then. Another mutual close friend of ours told me everything because she had witnessed it herself, she said my friend had his number, always flirting with him and they even planned to meet and all. Looking back, I remembered seeing his pictures on her phone and her giving me a sarcastic reply when I asked about it. I also remembered a time when we all went out together and the two of them were Mia for a few minutes which now makes a lot more sense to me, our friend told me she kept it from me all those years because she didn’t want us to fight. I had already lost contact with the other girl years ago and when I saw her again two months ago after more than 8 years I walked past without speaking and acted like I didn’t know her. Sometimes that day just crosses my mind and I miss our friendship back then. Do you think I did the right thing or I should’ve just let it go since it was years ago