@CocoDeMoll, I'm like you and like that with one of my male friends OP I'm small and feisty and won't back down from a challenge and he's large and irritating and likes to push my buttons till we're literally rolling around on top of each other wrestling. I'm 4ft10 and he's 6ft4 and we're forever wrestling, tickling and climbing on each other or blowing in each others faces/ears, licking or pretending to bite the other. We're equal in strength (I used to compete in weightlifting till I damaged my had and I still lift and play women's rugby and he plays semi-professional hockey) but he's always going to win because he's so much bigger than me.
Last time I saw him we we spent the afternoon with me sitting on him (I moved to get something from another room and he immediately stretched out on the sofa and refused to move) and throwing marshmallows at his face, we got bored of the movie we were watching and started prodding each other because we're both ticklish (me more so than him), that ended with him pinning me on top of him while I laughed and licked the hand that was restraining mine so I could sit up. Later we ended up standing on the couch hitting each other with cushions and laughing, in the midst of that a friend distracted us and he lunged to pick me up (I'd bet he couldn't) and then he put me down I answered my friend and he dove to pull my legs out from under me knowing I'd grab him either by his collar or his neck and pull him down with me. That 'fight' ended with him pinning me against the sofa while we laughed.
It's something we both enjoy and wouldn't do with anyone else because our other friends aren't into play fighting, it's something I've always done with my sisters and nieces and nephews. It's fun and as long as no one is getting upset or hurt who cares. It's a good way of getting rid of tension and stress and is kind of our way of 'hugging' each other without hugging because neither of us are into that.
My friend and I could hurt the other, him more so than me because he's just so much bigger than me but he's like a gentle giant. He's always careful about making sure he doesn't hurt me and we have bruised the other before but neither of us have noticed until after the fact and it's not an issue because we both bruise easily anyway. The biggest danger I'm in is laughing so much I need my inhaler but that happens any time I laugh.
You do you OP and don't worry about what anyone else is doing 