An empty glass

So I was thinking of what I can base my current situation with.

Think of me as a glass, filled with some dirty water.
Horrible. Disgusting. Unappetizing.

Now some people tell me to let go of my past. Okay.
So if I pour away the dirty water, I'm left with nothing.
An empty glass.... waiting for the waiter/waitress to fill me up with joy and happiness.

....okay, just waiting for the waitress