Jealous when he gets his hair cut

Am I the only one that feels this way bc this is crazy but true.

Every time my bf is about to go out or go to a party he goes and gets his hair cut and gets a line up on his beard .. it makes me kind of jealous bc it’s as if he’s trying to make sure he looks good for other people and he really doesn’t care what he looks like for me.. he can go months without it until there’s a party or he’s going out with friends will he then book a haircut appointment . This weekend he’s leaving to another state for a party and he just left to get it done... why do I feel extremely jealous smh .. the good part of me tells me to grow up and that it’s the same thing as women getting their nails done or hair done when they go somewhere not necessarily for other men but for themselves and just to look good & clean but th negative side of me is telling me it’s for other women and wants to make sure he looks attractive enough ..