Heartbroken / shattered

Well I usually never do anything like this but I have no one else to talk to about this. I have been dating this man for 6 months and I thought I really found the one he was very charming and sweet for about three months into. You see we both were just boyfriend and girlfriend both taking things slow so we were not living together or anything like that, any way we would talk all the time even text each other while he was working. After three months into it I started noticing him becoming really distant so I asked him if everything was ok he said yes it's fine I told him that it was starting to bother me he said everything was ok just busy. Well then he tried being more attentive for about a week and he started pulling away again, so of coarse I tried to talk to him about it again and tell him how it was making me feel that is when he started treating me very cruel saying he was busy and that it is not always all about me. That was the first time I cried my eyes out. Then after that things started improving again until this last time. He just outright ignored me to were he was not taking my calls, texts, or anything. So I was so hurt and upset so I emailed him telling him how he was hurting me by shutting me out and if he didn't want to be with me then to please so I don't have to go through this. Well then I didn't hear from him for two days then I get a call from him telling me it's not going to work out anymore because I am to insecure and crazy. I was in shock but so hurt all I could do was cry and hang up it litterly shattered me. This same man promised to never hurt me was always saying he loved me things like this and we had amazing sex but I just don't know what I did that was so wrong? Also two days after he broke up with me he asked if we could still be friends it took me by surprise and total shock all I could say was ok but I just don't know what to do? Can anybody she'd some light into this because I have never had this happen to me before??

I think you might have misunderstood we were in a relationship so yes we dated went out places it was not only sexual. So yes we spent a lot of time together. This is why I am confused as to why he wants to remain friends when he is the one who broke up with me??

Also to add he told me a month after dating he was in love with me and always would say he loved me. We both loved each other it wasn't that I just fell in love with him. Can you see my confusion? I just don't get it??