Is it wrong to ask for his passwords ?!

So me and my bf have been dating for about two years now. He cheated on me by trying to have sex w a girl over Instagram about a year ago. We tried to make it work but it didn’t. I saw someone else and we broke up but Like I said it’s been a year now and we are back together. Everything has been going great and he went into the military and got his shit together. He wasn’t following the same girls and he wasnt liking pictures, until yesterday. He likes this girls pic and she just looked super sexy with a lot showing. I was about to break up with him when he told me he accidentally liked it and he didn’t even know he did. It’s hard bc he seems like he’s changed and is trying hard but am I wrong for asking for his passwords? PLEASE someone respond bc I don’t wanna seem like a crazy girlfriend 😭