Is my ex-boyfriend over me?

I broke up with my exboyfriend about 41/2months ago. We were together 6 years and we spent a year apart before this last break because I felt the relationship wasn’t going anywhere. After 3years he was talking marriage and was even looking at engagement rings but then the talk stopped. After the first breakup about 4 months later I met someone who was interested in me and we began dating for almost a year off and on but this man did not believe I was over my exboyfriend. My ex was still phoning me asking for another chance and telling me how much he loves me. So eventually me and the other guy went are seperate ways and I was reunited with my ex boyfriend. After 2months in the relationship, I broke it off again because nothing had changed and we did not resolve are issues, I felt I lost my attraction for him. A month after the break up he started seeing another girl and now has moved in with her. I found this out when I phoned him one day to see how he was doing and he answered the phone by calling her name because he thought it was her calling him right back. I learnt that he started to see her and he claimed that he was over me and that she wants a comitted relationship. He told me that they were intimate and that he sleeps over at her apartment. Since I told him he must move on, he surely moved on rather quickly but before we broke up he was still telling me how much he loves me and that we could work it out. Is that a rebound relationship? It hurts me to know that he has someone new because I never stopping loving him its just that I wanted more seen that I invested 6years in the relationship. I’m I wrong to want that? Do you think his love for me is completeley gone now that he is with this new woman or this his way to get over the hurt of our relationship?