Anyone caught feelings for an FWB?

If so, what did you do about it? Did you tell them? How did they react? How'd you tell them?

A close friend and I hooked up a few times last week, and I've liked him a LOT since I met him last year. He had a girlfriend when we met, but they broke up 2 and a half months ago.

There's always been a mutual attraction between us, but neither of us acted on it until last week. I can't tell if it's love or lust at this point, but I feel like I'm going to fall for him sooner or later if this goes on. I don't know what to do 😩