Your situation is not unique, we have all been there.

The problem is the damage it does to us. We want more, and hope that the more time we spend with them, in or out of the sack; they will see us for what we want, and convince them they want this as well.

It only end is heartache, and sadness, as we will feel used, giving so much and not receive what we think our goal or reward was.

This leaves us depressed and with low self esteem, 2 very bad traits. Nobody wants to be around someone that thinks lowly of themselves, and depressed people, are well just that, depressing.

Put a nice dress on, walk tall, and smile often. Do your hair, makeup, etc every day like you are going on a first date. You will be amazed at how many men will do a double take, ask for your number, and pursue you.
Be a creature like no other.

I guarantee you, if you go out to the bar, look like a million bucks, are confident, and mysterious, men will flock to you. Your fuk buddy will look at you in a whole new light. Then, find one or two guys to visit with all night, it will either drive him nuts or he will dismiss you. Again, either way, you win.

Good luck -