What to do with a self-centred politician who I'm in love with?

I went out with a politician for about 6 months, and for the past month we haven’t seen each other. He kept saying he’s busy and will come to me very soon, which I soon got sick of. Even in our good days we only see each other once a week or once twice a week. He stood me up for Christmas and New Year’s Eve, I haven’t seen him since then. 2 days ago I texted him a message asking him to come by my place to pick up his X’mas present then let’s call our relationship off. He didn’t reply and yesterday I bumped into him in a club with his political friends, he said hi to me really coldly and walked away. I said hi to him like normal and with a smiley face on me, he didn’t seem to appreciate it. He peaked over to see who I was with a few times and whenever I looked over he turned his head away. He acted as if I was the one to have done something wrong, I was the one abandoning him. I feel really bad and really wants to talk this out with him. But he’s a man who doesn’t want to know about his own problems, like worshipers and way too self-centred. I asked him out for a coffee and he didn’t reply, I said we need to talk and he didn’t reply either. I really like him and wanna be with him, I just want more attention and care from him. How can I do that? What can I do to bring him back? What is he thinking?