Should I wait for him or should I not?

I met my ex-boyfriend almost 6 years ago. We were both happy and in love with each other. We both knew that we would have a family together and we knew that we have found our better half. About 1 year ago i started going thru stress at work and it starting affecting our relationship. He would try to hug me but i felt over whelm and would push him away. But I always made sure to tell him that I loved him a lot and that he was my all. 3 months ago, he asked me for a break. I gave him one, but I asked him if there was someones else. He told me that there was. He had just met a girl on a dating site, and he clicked with her. I felt very hurt and betrayed. He told me that he loved me and he will always love me but he needed to know why he was so attracted to her. i asked him to forget about her and stay with me. He told me that if he did that he would always wonder about her. So I broke up with him. I returned everything that he ever gave me. When I got home I was completely destroyed. I cried and cried. We share a very good mutual friend. He called her crying and saying that there was no hope for us. That I had given up on him. My friend text me and i told her that there was hope. After that I decided to give him his space. Two months passed and I asked him what he felt about all of this. He said that he was still stuck. We share a cell phone plan and i noticed that he was sending her a lot of text messages and pix messages. I asked him what the pix were of. He said that it was all PG pictures. I didn't buy into this. One day I decided I was going to call her and find out what the picture were of. i dialed her number and after 3 rings i hung up and decided to call him instead. He answered and I told him that I wanted to do something that was going to make him very angry. He asked what? I told him I wanted to call her to find out what kind of picture he was sending her. He told me that I better not. She text him telling him that I had called her. He flipped out. He told me that that was it and he was tired. So I told him fine. I went over his house to change his cell phone line to his name and I asked him one more time to be honest with me and to tell me what kind of pix he sent her. He told me that they were of him masturbating. This broke my heart even more. I asked him why? he said that that he didn't know why he did it but he did. I asked him to be honest and tell me if he still loves me. He said that he did. He then told me that it sucks that I had to go all crazy on him because he had already made his decision and he had decided for me. This broke my heart even more and made me feel guilty. Well he broke up with me. I was miserable. A week passed and I was feeling very vulnerable and depressed. I was at work and like around 3pm and get a text from him saying "so what you're not talking to me ever again?" This text messed me up completely. I started crying, hyper ventilating, shaking! I had to hide in the bathroom at work. Just to cut to the chase, I text him back and we starting talking again. The next day after this. I called him and asked him why did he text me again? He responded with "did you preferred me not to?" He told me after that he wants to know of me and that he missed me. He told me that he still needs time but he doesn't want me to wait for him. He wants me to move on. That maybe down the line we can be together again. He did ask me to tell him as soon as I started dating someone and that that would be his cue to leave me alone. I asked him the same thing. I asked him to tell me if he starts having more feelings towards her and I would also leave. I agreed with just being friends. I honestly thought that I could just be friends with him. But its very difficult. I know he is still texting her and sending her pictures. He tells me that they're not bad pictures, but I don't believe him. I feel jealous and I'm hurting bad. I cant sleep at night. I cry all the time. I feel like I'm in pain! I love him with all my heart! But I know that he doesn't feel the same. What should I do? He has given hope that someday we might end up together again but I'm getting hurt while I'm waiting! I don't know what to do......