My bf thinks I cheated on him but i think thats not cheating, pls help me if im right or wrong.

So my boyfriend thinks i cheated on him and he is giving me second chance in our relationship but i think i didn't cheat on him. We both were all good but then one day one of his friend comes to him and says that i use to like this one senior guy frm the same clg where both my bf and i studied and it was before i came into relationship with my bf and then he was shocked and refused to believe his friend's words. Afterwards my bf asked me that if its true that i liked that senior guy in the past then i said yes i liked his dance but we were not engaged in any conversation and i wasnt involved in any emotional or physical intimacy with this senior it was jst a small crush that went away 1 or 2 years before my bf came into my life. So my bf felt betrayed said he is hurt because he came to know it from his frnd and not frm me and i totally understand it hurts to know when it comes from some other people's mouth he believed in me but came to know that his friend was telling the truth but once my bf himself said that "dont revolve around past" and that he doesnt give much importance to pasts because past is past so whenever i wanted to share something about my ex or past he use to say i dont wanna hear about pasts so i told him that i was not hiding the crush on senior thing from him and as it was relating to past i didnt think it as important (keeping his words in my mind) and i wld also tell him about it sooner or later in a flow. This matter was already solved in 2025 but now this matter is the reason our relationship is taking a turn for the worst. Today after my cls ended i told my bf about one of my clsmt who gave second chance to her bf who cheated on by her i said that she should not give any chances because the more u give chances to them they wld cheat again and again then it all started from here onwards my bf says " if it's true that no one should give second chance to cheaters i should also leave you because u cheated on me and now im giving you a second chance" but i tried to make him understand that i did not cheat and im not a cheater because i was not involved with that senior mentally or physically but he repeats again and again only one sentence "u are a cheater" yeah i understand that he got hurt and maybe in someway i disrespected him by not telling him sooner and later he got to know it frm others but that's not cheating cuz i wasn't involved with that senior while i was in a relationship with my bf nor was i involved in any emotional or physical connection with him in the past it was jst a tiny crush like when u see a dancer or a celebrity u get " oh they dance very nice or look good" that impression abt them and thats it.

TL;DR: My bf thinks i cheated on him But i think i did not cheat on him, now im confused.