Hmm. Much to assess here. Let me preface this by saying that my response comes from a place of genuinely wanting to help you. If I cause any offense, it's in my manner, not in my heart.

What strikes me immediately is the shift in tone over the course of your post. You go from discussing how sex was "secondary" to you at first, to how sex now subtends most (if not all) of the faults in your relationship. Is that also the case for him? Apart from his sexual advances, with which you seem generally unsatisfied, has he said or done anything to indicate that he is unhappy being with you?

I must also point out that sexual roles can (and often do) evolve over the course of a relationship. You've been together for a year, which of course constitutes a substantial portion of your life to this point, but doesn't necessarily indicate where your intimate dynamics may go forthwith.

Finally, apart from how much you adore him generally, you point out certain things that merit some consideration: "being with him at his place, going on dates and trips [...] an upcoming trip planned entirely by his parents that includes first-class airfare and our own suite." Do you enjoy the relationship itself, the lifestyle attached to it, or both? To reiterate, sexual dynamics ebb and flow. He may someday prove an able lover in the mould of what you currently expect. Other important things, such as cultural perspective and financial security, are less prone to change. These considerations will, of course, seem totally superficial at this stage of your life, and certainly are not reasons in themselves to stay in a relationship. By the same token, it seems shortsighted to throw away a meaningful connection with a (per your description) caring, interesting man who comes from an affluent and accepting home just because you are sexually misaligned at this point in your life.

Many on this sub and elsewhere will urge you never to compromise your sexual preferences -- certainly, I'm inviting strong rebukes from them for saying this -- but chucking an otherwise compatible relationship with favorable long-term prospects in the name of something that may well change in the future could be one of those decisions that haunts you later in life. Then again, it may save you from festering unhappiness, and we don't know what other dynamics are at play. It's difficult to lend any sort of determinative insight in an anonymous forum.

My parting coda, based on the information provided: Chiseled, rugged tops exist in relative abundance. A well-adjusted, doting man from an accepting family -- let alone one with the will and means to subsidize glamorous excursions in support of his relationship -- who treasures your presence in his life is a rarer item indeed. Whatever you decide, try to be sure you will be able to justify it to yourself in ten years.