My husband messaged this girl...is this bad?

My husband developed a “friendship” with this girl that lasted about a year. The whole basis of their friendship was flirting to the point where they would send each other selfies and I suspect even sexting.

They stopped being “friends” because she got mad at him and kinda ghosted him. (I know all of this because I’ve just had access to his text messages)

Suddenly she came back and he’s pissed at her telling her that she’s horrible for deserting him but that he still wants to be friends. It seems like this girl agreed, but he says the following

“Does what I say make sense? I would like to be friends but it has to stay that way....”

And she goes on and agrees that friendship is all there will be.

Any thoughts on this ladies? Before I confront him I would like to have anyone else tell me what they think...

I have an update -

I have kept track of his messages and guess what, he asked her to lunch. She agreed, they’re supposed to meet this upcoming week.