i think the main problem for me is the taste of it! and the texture and all, it gives me a gaggin reflex every single time. is there some way to make it more pleasurable? be it taste-wise or texture-wise?

Yes: you can get your boyfriend to improve his diet. He should drink more water and fruit juice, eat more fresh fruit (especially pineapple, but any fruit is fine), and cut out as many strong-smelling foods/drinks as possible (e.g. garlic, onions, red meat, coffee). If he does this for at least two days before you’re planning on going down on him, his man-juices will taste sweeter.