I'm VERY jealous over my boyfriend. My lack of trust is ruining our relationship?

[melissa]

I've never felt jealousy over a guy ever in my life until I met my boyfriend. He has a Twitter & sometimes he'll favorite selfies of girls. No, he doesn't even know them. But still. It pisses me off to the point I feel my body getting hot lol. I'm serious. I hate it. We even got into an argument about it the other day and we didn't talk to each other for three days. We broke up but still talk like we're together. He said I have to change. I AM guilty. I harass him when I get jealous. I accuse and I can't help it. He also has a celebrity crush on Miley Cyrus and he posted a pic of her on instagram and was like "the wifey" That made me soo mad that I had to smoke a cigarette. Like wtf. I try not to get mad, but I can't help it. Sorry, I don't like my boyfriend favoriting other girls pictures. I can't help it but get pissed off. Am I cray cray? What should I do?