Eating out?

So I need to vent in a way but I've been feeling like this for a while and I want to get past it. So my boyfriend and I have been going out for just under 7 months and I love him to bits. We are also very comfortable with each other and the sex is fantastic. But recently he's been wanting to try eating me out (we were each others firsts BTW so he hasn't done anything like it before) and I'm not the most comfortable with my vagina. I've always had a love hate relationship with it as I am a bigger woman and I've sadly gotten stuck on the whole "mine doesn't look like theirs" train. I know he loves me and doesn't care, but I'm very worried. Questions like what of it smells or tastes weird or other things like that run through my mind. Basically I'm writing this in hopes that I'm not alone but also hoping you all could offer some advice on how to bring myself up and get over these fears? Because I really want him to, but my anxieties get in the way.