Do I have the right to still be mad?

About four months ago I started a secret relationship with a guy at my church. About a month later I told him it wasn't working out because we didn't see each other enough. Two weeks after that the church went on a trip to a concert and everyone took the church bus. He sat behind me and kept flirting with me and bothering me. I fell under his flirting spell and started liking him all over again. We sat together at the concert and on the way back ate at a restaurant together. We didn't start dating again, but we were talking about it.

About a week after this happened he texts me telling me he needs to tell me something. He tells me that he met another girl a couple days ago and is starting to like her. He told me that he thinks we should see other people. I asked him if he even still liked me, and he said yes, but not as much as her. He told me if it didn't work out between him and her that we could get back together. I have basically disliked him ever since that. His name in my phone is Jackass. He texted me a few times after that but I remained cold. Eventually we stopped talking altogether. Do I have the right to still be mad? I sometimes give him evil glares at church..That's bad, I know. And childish, but he really hurt me. I couldn't like him ever again if I tried. I currently like a great and kind guy! He's so sweet.

So any input would be greatly appreciated!