I ran into the same problem a few years ago! It's frustraiting as hell, but I don't think there's much you can do (though I will admit you've already done more than I did at the time by looking up methods and asking around ^^ ).

The guy I was with was a one-a-day kind of guy at most, and I simply made him aware that that just won't cut it for me usually. I asked him if he could spend more time on me, not being selfish just asking that both our needs are met instead of one more than the other. It's understandable if he doesn't want to thought, it does take work!

I hate to say it this way, but the way that I got through it was to make him aware whenever I was horny, but not push it too far unless I could tell he was up for it too. Otherwise I would just bare with it, or excuse myself to the washroom if I got way to pent up.

Good luck and I hope you have more success than I did. And if it helps, me and him broke up because of completely unrelated matters, not because of sex. We couldn't handle distance when we both went to different universities.

KLove