How do I get my ex back? Please help, I'm heartbroken!?

Hi, I don't know what to do, please help me. I met this guy, "M" about a month ago. He is amazing. Handsome, owns a successful business, so sweet and attentive to me. He flew me out to the Caribbean (where he lives), took me on his yacht to a deserted island after just meeting me. He told me that he really liked me. I have been going through a hard time, and even though he is great, I just wasn't ready for a relationship, and I told him this. I went home, and he kept pursuing me. We went to Miami together, and had a great time. He told me he loved me, and wanted to marry me, and have a relationship with me. I decided that I wanted to give this a chance with him, and I told him so. It was his birthday weekend shortly after that and he didn't invite me. I got very upset, after all, he told me that he wanted me to be the mother of his children only the week before. I lost my father when I was younger very suddenly, and that was why I had a hard time getting close to him at first. He understands that, and he promised me that he would never leave me. He didn't have to say any of those things. He was the one telling me he loves me, and flying me all over. He started to back away after things got really close with us, and I responded by being clingy, and desperate. I yelled at him, and freaked out. I know that this was the worst thing I could do. I apologized, and told him it wasn't his fault, that I could see him pulling away, and if he wanted to go that he was free to go, and that I only want what is best for him. He responds giving me excuses, and it kind of sounds like he is breaking up with me. He says that he doesn't want to stand in the way of my plans, and that being with him would do that. He didn't talk to me for days. I sent him a text a few days later to see how he was after a big storm hit his island, and he calls me baby, and is very affectionate, and responsive. The next day I tell him that I sent him an email, he says, "Okay baby..." still sounds very affectionate. I am not sure if he has even checked it yet. The email said that I loved the time we shared together, and that I know that I over reacted to the birthday thing, and that I cared about him, and still wanted him to be apart of my life. It was on a Friday, and I haven't heard anything back from him. I really felt that we have a great connection. We had so much fun together, he really seemed like he meant everything he said. What happened? How do I fix this? BTW- He was broken up with by his ex of 2 yrs, and he told me they still talk, and that she had changed her mind, and was trying to get back together with him. He said he didn't want to be with her again. Do you think he just used me? Help please. I am hurting so bad.