Lyrics

Say something, I'm   up on you
I'll be the one if you   me to
Anywhere I would've   you
Say something, I'm giving up on you

And I... am feeling so  
It was   my head
I know   at all
And I... will   and fall
I'm still   to love
Just starting to  

Say something, I'm giving up on you
I'm sorry that I couldn't get to you
Anywhere I would've followed you
Say something, I'm giving up on you

And I... will swallow my pride
You're the one that I love
And I'm saying  

Say something, I'm giving up on you
And I'm sorry that I couldn't get to you
And anywhere I would've followed you (Oh-Ooh)
Say something, I'm giving up on you

Say something, I'm giving up on you
Say something...
Legend

Meaning

"Say Something" talks about a breakup, where the lover is implored to make a statement that could potentially reverse plans, with the singers expressing humility, sadness and regret."
Wikipedia.

Vocabulary

pride

A sense of one's own proper dignity or value; self-respect

Over one's head

(idiomatic) More complex or confusing than one can understand; beyond one’s comprehension. (idiomatic) More than one can handle; too much (especially in over one's head). To be involved in a difficult situation that you cannot get out of:
This is way over my head. Can you explain it more simply?
I’m in over my head on this project. Can you help?

give up on sb

abandon: [sb] (sombebody)
I'm staying because I love you, and I'm not giving up on you.

Crawl

to move slowly or with difficulty, especially with your body stretched out along the ground or on hands and knees:
Do you let baby crawl on dirty floor?

stumble

to step badly and almost fall over