I 28M kissed straight friend 25M. Wondering what to do next?

I (28M) have a friend (25M) that’s only dated girls in the past. He’s also told me outright he’s straight when I’ve asked.

However, we’ve also kissed in a club which he says he doesn’t remember, he proposed a foursome with our gf at the time (I’m bisexual), sent countless shirtless Snapchats, and generally made plenty of comments that made me question his sexuality like suggesting I think of him while giving other guys head. I also know he’s done poppers with another gay friend and enjoyed it. He’s also said he would be interested in an orgy with girls. We FaceTime a lot and he’s often shirtless on the FaceTime and placing the camera close to his nipples.

I have a crush on him and if he’d reciprocate, that would be my dream scenario. However, I’m wondering how to approach it from here since he already said he’s straight and doesn’t have feelings back?