AITAH for not trusting my gf anymore after learning about her past

Me (26M) and my girlfriend (23F) were having an emotional conversation and i learned that in her past relationships she had cheated twice as well as sleeping with her bestfriend’s crush. She was in tears and very ashamed of this. I do know that she trusts me and see me as a serious partner to be able to tell these stories, yet it got me thinking a great deal about who am i dating and I feel i cannot trust her as much as before.

Am I the asshole?