Does he love me?

My ex and I lived together in New York for a year. We fought a lot but never truly splitted up. He treated me like a princess and we loved each other very much. However, I decided to break up with him when I moved back to Taiwan. It has been six months. Within this period, I’ve been dating a guy and he has been dating a woman too. However, few weeks ago, we got in tough again and broke up with our partners. We started to talking about meeting up again in New York shortly. I planned to visit him in March but he told me he’ll be really busy for work at that time. He hopes that I can hold until June or July. I can’t wait though. We’ve been fighting again because he doesn’t welcome my visiting. I try to understand his situation but I can’t wait anymore. Sometimes he missed my calls and sometimes he’s too busy to talk to me on the phone. He dropped the things we did to maintain our relationship. He doesn’t call regularly anymore. He doesn’t put me as priority. He told me that he doesn’t want me to fly back to New York because I will interfere his work and his peaceful life. What can I do? I miss him so much and can’t hold this anymore… Also, I can’t understand, if he loves me, why doesn’t he want to see me as soon as possible? Why did he tell me that he wasn’t happy when I told him I’m visiting soon?