Background/Context:
I recently asked my girlfriend to marry me (she said yes). In many respects we get along very well. Our relationship was actually even better when we lived together. Last year, she began work on her law degree at an ivy league school on the other side of the country. I am currently tied to a mid-sized (city 450,000; metro 2 mil) city in the mid-west because of a family commitment. I am from a very large city, she is also from a very large city.
Problem[s]
1) Months after enthusiastically saying that she wanted to marry me, she interviewed [and was offered jobs] at prominent firms in large cities. While her attainment is wonderful, this isn't exactly a show of love. She ultimately decided to come back to this mid-sized city, but did so with a moderate amount of bitterness attached.
2) During her last summer break [before deciding on career path] she a) broke a fairly significant promise to me but promised to make it up to me; but b) spent the rest of the summer taking me for granted [I swear, I am the opposite of needy, her conduct was severe], and being very inconsiderate. This was a significant departure from the rest of her behavior before the summer.
3) Sex drive: We have always enjoyed a very strong and trusting sexual/intimate relationship. In the first year of our relationship I had to calm her down because our sexual relationship drove her to want sex constantly. After that, our relationship was mutually ideal in both quality and quantity.
However: Beginning this last summer, she began to repel many of my advances rudely, and now makes commentary that she is concerned that my sexual desires are too frequent for her to handle. If anything, my advances are less frequent now. Our relationship is 3 1/2 years old.
Question/Opinion:
My questions generally revolves around whether 1+2+3 combined mean that we may be incompatible. We talk often and our relationship is generally good, but 1+3 give me pause. I am hesitant to end our relationship because she has forgone significant career opportunities to be with me. As such, I would like your opinion as to the severity of these issues.