Thanks for writing to Just Answer.
The part of you that is telling you not to put yourself through it is the part that is actually working in your behalf.
While there is nothing wrong with adult consensual sex, there is a very good reason that women usually are the ones feeling hurt after a while.
There is a hormone, called oxytocin, that causes people to bond--when a woman gives birth, there is a ton of that hormone released, and that's what causes her to bond so tightly to the infant. There is also research being done to give this hormone to people with autism to help them relate to others better.
This same hormone is released during sex, and more so with orgasm. Once you have slept with a man a number of times and this hormone gets released, you will feel bonded to him....regardless of whether he's good for you or not.
Here are a couple of articles on this phenomenon:
Science behind falling in love
So even though your head tells you to go on and enjoy the great sex until something better comes along, it will be almost impossible for you to do this and let go at the end and not feel devastated--due to this hormone. Think how badly you've been feeling after just two weeks with him. The more hormone that gets release, the more the attachment. The pain after sleeping with him for months will be that much more intense.
And because you are looking for a committed relationship, continuing with this man is a really bad idea. The type of man you are looking for--stable, trustworthy, monogamous--is not likely to think that a person who is in a sex-only arrangement has those same characteristics. Like attracts like. If you want monogamy, practice monogamy.
There is an incredible book I've found that will help you figure out exactly what you want in a man, and how to find it. Even though it has a cheesy cover, the material inside should be required reading for all women in the dating world. I highly recommend it (as if you couldn't tell :-)
Temptations of the Single Girl
I wish you the best. Consider it a favor that he only led you on for two weeks...there's something better for you out there!