Search Results: hard to notice flirting

My guy friend and I tease each other a lot. Usually it's silly and harmless but he seems to like it more the harder I tease. I'm really sensitive so I try to never tease anyone too hard or about personal stuff, like weight or looks, but he seems to want it. Is it fun for guys to really bust balls? My friend calls himself fat, I never would, but we were dancing and he was slamming his ass against mine and I said his ass was huge. He admits to getting bigger jeans.

He's super vain about his long hair but his hairline is really receding. His guy friends bust on him for that and he seems to be ok with it.

He can't say r's right and after he mentioned that I said I'd noticed but hadn't said anything. I've started teasing him about that too.

Today we were carrying snacks to a club mtg and he dropped some cereal bars behind so I picked them up. Once he realized this he started dropping them on purpose and I saw him smiling at me picking them up. Once we got to the mtg I took the cereal bars I'd picked up and threw them at him, hard, one by one.

We have tons of running jokes and like to prank each other.
Is this how guys like to flirt? Should I get meaner? He's called me sassy before, in a good way. He doesn't act this way with other girls, does that mean anything?

We ate lunch together today, his idea, spent all day after exams together at school sitting with our arms pressed together. Then I gave him a ride home and we hugged.

We talk everyday and/or text, message, snap. He sends me shirtless snaps of himself in his room and has sent me a kiss emoji twice and claimed he hit the wrong one both times. We jinx each other all the time. He's always talking about sex around me or makes sexy eyes and claims he's kidding.
I was dancing at our club mtg and I saw him watching me but pretending to be reading.

Is he just being friendly or flirting?