How to taste better

The other night my boyfriend and I were messing around and I gave him a blowjob and he ate me out and said that he didn't like the taste and I don't blame him because he kiss me later. What are some ways to make myself taste better for him?

First, make sure you don't have an infection. I'd see your doctor if it smells or tastes really off.
Of course, washing regularly, and using a gentle, non-scented soap on yourself down there is important. Remember, don't put any soap inside of yourself, as that part of you cleans itself, and the soap will irritate it.
I'm not sure of this one, but I think diet can affect the taste as well. Try to eat healthily--even if it doesn't improve the taste, it will improve your wellness.
Resist the temptation to douche, as they do more harm than good.

Lastly...unfortunately, even if you're healthy and clean, some guys just don't like the taste of women. Maybe once you know you're in peak condition, he can try to get used to it.