Oral Sex Infairness

So... I'm not ridiculously bitter over this; mostly because I've never really gotten anything out of it, but I give my SO bjs ALL the time.  I enjoy it. I enjoy making him feel good. And I honestly love his penis. Haha it's glorious. But in 7 months, he has NEVER returned the favor. I thought he was going to once, but he ended up just handing out down there and playing around, kissing my thighs and such. He's kind of a nervous/shy type of man. It took him a long time to get confident during sex. Does anyone else experience this? How do you handle it? How should I address this with him?