Hopefully this will help you. I had a JW girlfriend who absolutely broke my heart. I didn't eat or want to leave my apartment for an entire week, I was repeatedly thinking about her day in and day out.
The girl knew how much I loved her but in the end she used me to gain all the benefits of having a boyfriend while avoiding the commitment. She told me she loved me but her behavior didn't reflect it. I was the one initiating all the contact and making all the plans to see her. I made every attempt to win her heart, whether it was by surprise gifts, helping financially, romantically, bonding with her family, etc. However, she was very hot and cold with me. There would be days where she would leave me completely in the dark by not responding to any of my text messages or phone calls. Only when it was convenient did she ever make plans to see me.
By speaking with friends who had successful marriages, I learned that REAL relationships start out with fireworks and all you want to do is be with one another. Doubts as to how you both feel should not exist. The relationship ended after realizing that it was a one way road. The girl was absolutely beautiful, great personality and humor...we were great friends before we dated, this is what was the most heart-breaking.
After much mourning and self-pity I made a promise to never let myself feel this way again. So I began reading about the psychology of dating. I was amazing to find all the red flags I had previously ignored. Red flags, that had I known about them sooner I would have avoided much heart ache. It was my fault just as much as hers for allowing myself to ignore the telling signs of a dysfunctional relationship. Understanding the psychology of dating is what helped me move forward. I learned many things, for example: if you make yourself too available or are not much of a challenge, you can kill your self-worth. Coming across as clingy, emotionally attached, jealous, or insecure are all signs of desperation that subconsciously damage relationships.
There are many other factors which contribute to things turning sour. The biggest one you must accept is that there are people out there who are truly broken. Regardless of any sincere efforts made to sustain them, dysfunctional people can never be fixed. In the end, you have to educate yourself, move forward, and find true love elsewhere. I certainly did, especially when I honestly didn't think I could. It will take time to heal but DO NOT lower yourself to a stalker, or an obsessed ex. Stop being a wussie and be a man. Focus on yourself whether it be physically, financially, or intellectually...the best revenge is being successful. You will learn and grow from this--it will be another chapter in your life before you move on to better things.
... OUTLAW