<human>: I (23/f) met a friend of a friend (30/m) and have hooked up with him twice, but in about a 6 month period. We have each others' numbers and send flirty texts now and again, but we definitely aren't an item, merely overly-friendly acquaintances, really.

So last weekend I went out with friends that both him and I know and hooked up with someone's friend (not really sure if he knows the guy or not), but the original guy heard about it. (Total one-night-stand, btw, I don't intend on dating this new guy or anything...)

Tonight, my FWB sends me a text: "heard you found someone to have fun with on Friday :)" and I don't know what this means. There's a smiley face. So is he flirting? Does he think I'm a total slut and kinda being creepy? I think he's cute and have a bit of a crush on him, so I don't want to do anything stupid and jeopardize my mojo.

Bonus points advice: Also, Him and I are going to a special event (not with each other, but neither of us are bringing dates) in a couple weeks, give me tips on how to redeem myself without looking desperate (besides looking *real* good, which I intend to do)

Summarize the given text in a few sentences.
<bot>: FWB called me out on hooking up with another guy, but seemed kind of flirty about it. What does he mean by this?