I just hate this anxiety!

Ugh! What a terrible feeling I have right now. It is almost like a deep fear I have. I can't help to think that what if this girl is the "one" for him? What if he never calls me again and I have no closure..hense there has not been an offical break-up. He will not return any of my text messages..I only sent one regarding his stupid birthday..I pretty much feel alone, like a piece of garbage, like he just doesn't care which in fact I guess he doesn't. So many questions ravishing through my head. ;(