Let's just be honest, if you are a guy you think about sex a lot. It's in our nature. However, we aren't simply breading stock without the ability to make decisions and control our behavior.
If you are a woman dating a guy and you feel like you're being used, then you have the wrong guy. You don't have to settle for less ever.
At the same time, keep in mind, what expectations are you setting up at the beginning of the relationship? Is your ex, your ex boyfriend? Was sex an early part of your relationship? If so then it is a big part of what your relationship is based on. Relationships that start with physical atraction have a hard time growing into wonderful permanent relationships. That's all I seemed to have before I met my wife.
Finally, one day I quit dating entirely. My wife and I became friends volunteering at church. I found that I could talk to her about anything. She took me seriously, and also didn't try get me to change. She accepted me as I was, and liked me as I was. That formed the basis of our relationship over a year, then three months of dating after that, and another six months of being engaged. My wife and I are going on 15 years of happy marriage.
Frankly, I think about sex all of the time. My desire is for my wife. This is flattering to her and she desires me as well. The reason is that our relationship started on a foundation of faith, friendship, and shared values. Our marriage is one of freindship, teamwork and enjoyment. That makes our desire for each other even stronger.
How about telling a guy that you are not going to have sex until you are married. Build a relationship based on personal and spiritual intimacy first. If a guy will be willing to invest himself in you and become close to you with only the addition of holding hands and kissing, then he might really be in love with you and not just having the hots for your body.
You are worth it.
My wife and I didn't get married until a number of our friends were already married. I had a lot of loneliness. My wife was worth the wait.