Whats that friggin word I cant remember?

WHAT IS IT!THIS HAS BEEN GETTING ON MY NERVES SINCE THIS MORNING!Look,lets say you insult my hairstyle.Some people dont care but i do.And I cant stop thinking about my hair and what I could to make it better.And I wont stop thinking about it.So ill spend my day fretting about my hair because of what one person.I think it would fit into this sentence.He is very blank about his appearance.