blowjobs

I've had a few long term boyfriends in the past, and 've never been comfortable with giving head mostly because I fear I won't be good at it but also because I just get too anxious about it. something about it intimidates me and makes me not want to. I've always read to "not freak out! it's nothing to worry about!" and "you'll do fine!" but I just don't know. It's not fair to receive head if you're not giving any, my boyfriend doesn't harp on me about it, or pressure me, but he's a boy and I know he would like it. honest opinions please? should I just get over myself and do it??