nada to say but hi

i know it's stupid, but a girl i was dating a while back but not too long ago is throwing a big ol' birthday"bash", and when we were dating, we were really close, i really liked her, you could say love, but i said some stupid shit and that's how it ended, and we eventually made up and became "friends"
and this party of hers, i at least expected to be invited but she didn't say anything, i heard it from a friend who was invited and he doesn't even know her last name!!!! so i'm a little bummed, i thought i at least meant a little to her. =[