I would see how it affects me; did it disadvantage me? Did it make me feel like a fool? Did it severely hurt me in a way? If it’s not, then I would let it go. I would act like it never happened, and since I’ve been lied to, then I’d be more careful with who to trust. But if it does hurt me and my pride, disadvantage me, make me look dirty, and make me feel like a fool, I would not hesitate to cut the ties, and act like they are dead to me, forever. If we meet later in the future, I’d act like we never meet before, I’d never speak a word about your behavior unless you start it first.