Should I disappear in silent?

It is really hard to describe my feelings now. Sad, disappointment, angry....

Sad because of feel like being betrayed and being dumped!!
Disappointment because of someone promises but cannot make it the end of the day.
Angry because of I'm just a small potato in someone's heart.

I'm so weak now...my head is gonna explode because of non stop crying...even though, no one will care about that. Who cares?

Am I disgusting?

Did I plan too much to have a happy day but ended up with the most sad ending?