<human>: Can you condense the text into three sentences or less?

I'm a 22F and my boyfriend is a 29M, dating for one year.

Okay, so I know that as a 22 year-old, I'm not nearly as emotional mature as I'd like to be and I haven't yet developed awesome relationship communication skills. However, I really would like to ask my boyfriend a question about his friendship with an ex-FWB so that I can understand it better without sounding crazy or passive aggressive. Here's what I'm thinking of saying:

>Hey <boyfriend>, I wanted to ask you something. I know that you and <ex-FWB> are friends now, but I don't understand why.

>A few months ago you told me you hated her because she "seduced" you into being the other man in her marriage <reader note: this happened before we were together> but you told me the other night that she was texting you again and I just don't understand why.

>From what you've told me, it sounds like she's just flirting with you and I can't say I'm comfortable with that. I know you guys have been friends for a long time and I'm not asking you to give that friendship up, but I do want you to help me understand what you see in her. 

> <here is where I'd love to point out that she is an attention whore that used him to make herself feel wanted and turned him into a white knight, but I think that's be combative of me and counter productive>

So, how was that? I think it could be better, but That was the best I could come up with.
<bot>: I want to tactfully ask my boyfriend why he's rekindling a friendship with an old FWB that I thought he hated, but I'm not sure how to phrase it.