Affair?

[Looneytune253]

Long story short if I can. Hubby became protective over his phone, started using it a lot more about a year and a half ago. He had an accident I found messages (of support) from a woman he works with. There were lots (I mean pages of chat from messenger) but all innocent enough. We talked about it and he understood how it made me uncomfortable.

Fast forward to last night I was looking at our daughters mobile account to check she wasn't going over her allowances and I noticed his was super high. When I had a look there was pages and pages of texts to one number. (On itemised bill). Asked him why there were so many and who it was and he replied probably x from work (one of his male colleagues). When I searched the number on Facebook it was actually the other lady. I don't know what to think. There's like 30 messages a day. He deletes all his texts tho (which is another red flag) so dont know what to say.
I genuinely don't think he would be sleeping with her or anything and he's horrified at how it looks but I feel really hurt and betrayed. He did actually get rid of his phone last night as he doesn't want it to be like that. He says she texts everyone and is just jokes etc back and forth and shes very needy generally but just a nice lady generally. What do u think?

[Looneytune253]

I just thought I was being ridiculous originally (still do ironically) and there's a complete lack of evidence but thought I was going crazy feeling like there was more. It's still niggling me but I'm gonna have to try and move past it unless something else comes of it.