Well, then keep on trying hun! Try not to put to much pressure on yourself and your boyfriend. It will happen. Try using lube, try a softer approach to clitoral stimulation, if you are in a happy, loving, caring relationship, explore, experiment, test! You guys together will eventually make it happen. I know for me, it always took time for to get "really comfortable" with the guy I was with, with my current guy, it took 6 months for me to finally orgasm from sex, a lot of sex with me on top, that way, you can gently grind your clitoris against him. And what about oral? Have him try different "movements" with his tongue, and maybe include his fingers inside, that always helps me a lot, with those two combined. But, the more pressure and stressed you are about trying to orgasm, your going to mess up your mind, and be so darn focused on trying to achieve one, you might actually be messing with your head, and not able to really be in the moment and just enjoy it. Remember, the mind is your biggest sexual organ.