What does his behavior mean?

I am married, but was never in love until the beginning of this year. I fell hard for this guy and we ended up sleeping together. After two months I told him I'm in love but he didn't answer back, he was just surprised that I could be in love with him in such a short time. I was going to get a divorce to be with him but he never told me he had any feelings for me, but judging by the way he treated me I thought he did. He has to travel a lot for his job and lives far away. He also admitted that he has cheated on his girlfriend with two girls simultaneously. He is charming and a lady's man. Because of his work he would disappear on me a lot. I told him that I am not a cheater and he needs to decide what he wants because I only slept with him because I thought we will be together. Recently he vanished for a whole month again and I decided to end all this. I blocked him on my phone but received a voice message from him. He would pause a lot between words, like he didn't know what to say. He said he knows I blocked his number but wants to know how I'm doing, If I'm OK. He also asked me to call him back if I have some free time to do so. At the beginning of his message he said his name, as though he thought I might have forgotten who this is. Why did he call me if he knows I blocked his number? Why was he pausing between words, when he is usually very confident and knows what he is doing? He kept me in the dark for 9 months about how he is feeling about me, is he just leading me on? I'm so lost, I don't know what is going on anymore. I love him so very much but i will not keep cheatting, it's wrong and I won't let him keep using me if he doesn't see us together. Any advice, especially from men will be greatly appreciated! Thank you in advance!