AITAH for asking my BF if he’s on any dating sites?

For context, there has been physical and emotional cheating in the past. We’ve mostly moved past it (he’s sober now so he and our relationship is a lot different) but some times I just wonder. Here‘s our text exchange. It’s kinda long. TIA.

Me: Are you on any dating apps?

Him: Not that I know of. I thought you erased them. And please don’t say that shit over text at work. It’s not fair and is not healthy.

Me: Um, weird response but sure, ok

Him: See this is why. No I’m not. I haven’t done anything and really don’t need this. I don’t know what you’re talking about. And to try and figure it out is bullshit.

Me: This is the most defensive response ever. It could have been a simple, no baby I’m not. Spinning it all into this is just weird. It’s fine, it’s just a question.

Him: How many fights are started this way. Bullshit. You were. You know exactly what happens and did it anyways instead of talking to me so bullshit.

Me: No, I asked you a question and you went off.

Him: I’m sitting here waiting for you and get this. Fuck this. Thanks.

Me: Omg so you see how youre making this all about you? It was a simple question 

Him: No it’s not. Not with our history.

Me: Reread how you responded. Its fine lol

Him: You believe what you want. I havent done anything. 

Me: If you had asked me, I’d say no Im not. I wouldn’t be mad that you asked me

Him: I’m not you. You send the text out of nowhere when you were so sweet earlier. I was so looking forward to seeing you all day. I haven't been on anything. Nothing. On my kids. Nothing. And you know i haven't.  I act different  and still. Fuck it whatever, doesn’t matter

Me: Jesus. Im allowed to ask a question. Im allowed to be anxious. This response is telling. You could have just said, no. You turned it around on me and now are mad. So okay whatever

Him: Then don’t ask over text. Be an adult. Like ive asked many times. You’re not a 15 year old girl.

Me: This isnt just the Scott show and everything is done how you want it. Okay I’m done with this conversation

Him: OMG. Ask anyone if thats the way for a adult to do it. See what they say. You won’t

Me: You really ran wild with this. And you’re turning it around on me.

It continues a bit more til I just say it doesn’t matter and that I won’t text things anymore. And him saying thanks for ruining the night.

I didn’t think asking over text made me the asshole but am I?