It’s been approximately 3 months, is it valid for me to still be hurt over this?

The fact is, I walked in on my girlfriend all over our best friend who I was messing around with first. No conversation with me, no consent. Just to find out she’s been sucking all on this man’s neck when we are all drunk, no wonder he always wanted to be in the middle and mostly would turn to face and cuddle her. Everything makes so much sense. For me, that is a core memory and I feel anyone else would have cut both of them off for that shit. That was not okay and I feel like I was gaslight into believing it wasn’t a big deal and “it just happened” is it valid for me to still be hurt over this?
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+1 y
By the way, my girlfriend and I are poly and she knew I was messing around with him and was okay with it because I told her about it.
It’s been approximately 3 months, is it valid for me to still be hurt over this?
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