End of a relationship?

I e-mailed my girlfriend April the night before last. I haven't heard back from her, not even an instant message. Saw that her freind Jami called, but that's about it. Maybe she is mad at me for not e-mailing her, but its hard to e-mail somebody when one is dead tired! I wish she was here with me... that would make things easier. But, if we are ending, then life goes on, and I'm not going to wait on anybody for three years just so we can start dating ever again. Waiting on somebody three years to get married I would do.