I have another friend who i also think is bi

Hes hot and has a girl friend but as school he always has a lowkey gay vibe. He thrusts his hips on guy friends and also gets handsy. I donr usually hang out with him, but one night we were at a award ceremony that was long and boring. So we just had small talk, then all of a sudden he put his hand on my lap and I let him. For about 10 min no moving just small talk and he kept it there. He also on the spot textes his gf they were breaking up offixially , they were fightinf for sometime. I dont have much more experienxe with him or other signs , but that was a little convincing just wanting to know yalls thouhhts