Figured it out

How do you sleep at night,
After all the things you've done?
Your fancy words, lies, and saying I was the only one

How can you look yourself in the mirror,
After all the things you do,
What have I ever
Done to you?

You could've took the easy way out,
Coud have told me from the start
Instead of lying to me,
And breaking my heart

You don't know how I feel,
Don't know what it's like
To be stabbed from the back,
And then both your sides

You chose not to tell,
That was a stupid move
Look where that's gotten us
Maybe next time you'll think, before you choose

Just so you know,
It wasn't that hard
To figure everything out,
Everyone pretty much noticed,
From the very start

You thought I couldn't tell,
Thought I was naive
Thought I wouldn't figure out,
But I'm not as stupid as you believed

And now you,
Are having the time of your life
I was just a dumb obstacle,
In both your lives

I'll never know why you didn't tell,
Maybe 'cause it would be hard
Or maybe it'd be more exciting,
To be at the sidelines to see if I fall

I'm finished with you,
Done with your lies
Now that I've figured it out,
I can only wonder why,
You didn't take the easy way out
By telling me at the start
Instead of lying to me, but I was wise to your game-
I just can't believe you couldn't see,
That I am not the stupid idiot,
You two both believed