I recommend this book:
I wish it had come out when I was dating. I had a boyfriend who led me on for a year and a half. It took that long for me to understand that even though he liked me and going out with me it was never going to progress to marriage or a long term commitment, he just wasn't that into me.
You will live and get through this and love again...hopefully the next time will be with someone who loves you back.
Josie