My boyfriend (26M) cheated on me (22F) online I asked for his insta password for one day so to give him a chance, am I wrong for asking his password?

Anonymous
We been together for two years, i found out the conversation between him and insta girl, the girl was flirting with him at first he even told her he has a girlfriend, that night he was very drunk he said.. but then they continued flirting, and she sent him nudes and he continued asking her more, then he told me he thought the girl is his ex messing up with her coz she has similar body and they r in same city and he wanted to figure out who is she if its his ex he would expose her but, nothing was innocent he asked for unnecessary things, he flirted her body.. ¡ love him a lot, he told me to give him a chance and he will make me happy and to start a new page together, i told him to give me his insta password for one day so i trust him again, he is so offended by this he says it breaks his ego and if he gave me his password he will be so heartbroken bez i treat him like that, he says its against his ego.. im trying to understand his point of view but i can't, he sent me screen of his DM's swearing there's nothing in his insta and no girls in dm, but i dont get why its so difficult to give me his insta password he told me he will think about it i know sometimes we talk with our friends in a way that we r not comfortable to show that side of us to out significant but i don't know. I dont understand why he makes it a big deal. And whats the relation between this and ego? Am i wrong for asking his password?
My boyfriend (26M) cheated on me (22F) online I asked for his insta password for one day so to give him a chance, am I wrong for asking his password?
4 Opinion