Scared of blowjobs?

Ok so don't get me wrong, I love having sex with my boyfriend, I mean I think he's the sexiest thing alive lmao. But I have this like fear? Of giving head? We've been together for a year and I've tried to give him head a few times but usually I just stop and we have sex. I don't know what's wrong with me! Blowjobs just scare me 😭 I used to be deathly afraid of cum but after he and I started dating I've become more used to it. Blowjobs just scare me or gross me out or something. But yeah anyways! Can somebody give me some tips/tricks on becoming more comfortable/ better at giving head?