from what i’ve experienced guys don’t really liked to be flirted with in the same way girls do, guys like more complimenting on things they do/ how you make them feel/ accomplishments they’ve done rather than girls who like physical appearance compliments

something like “i’m really impressed with how you put that whole pc together it looks really complicated” or “i love talking with you at the end of the day it always feels so good to me” or “you always suggest good movies for us to watch/games to play” or since you’re long distance maybe describe how much you desire for him to be holding you and how much you want to feel his lips for a less lewd but still intimate flirtation?