cancer man break-up

Well, I see a lot of women here confused by cancer men. I was hoping to gain some clarity on my break up.

I have met this cancer man a year ago, and we have been friends ever since. I had to move 4 hours away and we would still talk occasionally. After 6 months I went back to the city where we met, and he told me he loves me he really missed me and he wants to be with me. He said the distance does not matter, he will wait for me, as I said I can move to his city after 6 months when I finish my study and also we can visit each other. Everything started out perfectly, he made me feel like a queen, he was my best friend, I was comfortable to tell him anything. He came to visit me once after 2 months of long distance dating, spent 3 days together and it was like a dream. He spent a lot of money on me, gave me gifts, we were just cuddling and telling each other how much we love each other all the time. He kept writing me essays of how much he loves me after he went back, telling me that he will come next weekend cause it was like a dream.He kept saying his goal is to move in with me, and talked so much about the future, and next 5-10 years, said he doesnt see himself with anybody else, not even single. He never came to visit me again though. And I cant visit him as he has no place for me to stay, so the only way is for him to come to me.

He found a new job, and was going for a promotion, started spending all his free time with colleagues, and texting me less. He still texted me every day, but only late at night and very cold and distant. I did not say anything, he raised the issue himself one day that we talk so much less, he is afraid ill find someone else, he doesn't want to lose me he loves me more than before. He tried to start talking more with me, but still after a couple of days again, felt distant, going out every night with colleagues, barely writing me a sentence. He said sorry he didnt find any other girl he is just working so much, which I believe, as there are many pics on facebook with his work team. After a while though everything got even worse, he became very cold, my messages where always warm and loving, and he would answer like talking to a friend. He told me when we were dating 2 months that he thinks he has cancer. And I kept nagging him that he should go to the doctor asap, he postponed it for a month, and then in the last week he wrote me that he went to the doctor and he will have a surgery. He was devastated by the news, I tried to be supportive and not try to take his coldness personally, as there is a lot he is dealing with. He was offline for 2 days went out to drink to forget about his problems. When he came back i asked him about us, he said he cant handle the distance. For a week I kept trying to talk to him, asked him what if i was there, would anything be different, his answers were I dont know, I dont know what is wrong, something is off. I have so much to handle right now, I kept all my problems to myself

he said sorry for everything, you are an angel, you dont deserve to be treated like that and so on. One night I decided to write him a loving message, and just wrote that no matter what I want to be there for him, and I love him, and I will be there no matter what as he is my soulmate. His answer was I am sorry for everything, I dont deserve you at all. Even though just a week ago he kept saying loving words to me, how he loves me, and wants to visit me again, which was our last warm and loving conversation. After he wrote i am sorry for evertyhing and I dont deserve you at all, I was really hurt, as I wrote him I love him and didnt get the same answer back. Anyway, I blocked him everywhere, just to move on, as it is obvious to me this man does not want me in his life. We dated for almost 4 months, and I am still confused about how can a guy call me the love of his life and his soulmate, and change so much in just a couple of weeks? I kept asking if i hurt him, cause I know cancer men are very senstive, he said no I did nothing wrong. Altough a couple times I said i have doubts cause its going to be difficult for us to be together in the future, and he was hurt by it, as he said his only goal that he thinks about every day is us. I said Im sorry if i hurt you in any way with my doubts, but he said I didnt nothing wrong.he deleted pictures of us from social media, and unfriended my sister, and I can see him adding girls to his friends and liking their pictures and I just dont understand what I did wrong. I keep thinking its not me he is overwhelmed with problems, however he keep partying and going out and adding girls to his friends. Can someone explain me this change in behaviour?