Has this ever happened to anyone?

so im a junior, went to sadies w/ a guy friend whos a sopre. it was a little akward cuz we dont see eachother all the time but he made it fun and was really friendly. however when we got to the dance,(high school=grinding) it was a different story. i've only grinded w/ another guy, last year who was a senior so i guess you could say he had more experience. but the guy i went with this year seemed like he had no clue what he was doing. his hands were too high, above my hips, he was far apart, and he didn't have a strong grip. that kinda sounds weird but w/e. i cant help but compare it to last year. it was not fun at all cuz he there was so much space between us and it was akward! so what could i do next time to help a guy fix his dancing without saying it directly.