Started Great

I gave you another chance,
I must really love you.
But I know you don't love me,
Like others think you do.

I see you walk with her,
And you have such a good time,
That I guess I really don't matter.
That's what I'm telling you in this rhyme.

You say I'm crazy,
But you're the cause.
Always being with her,
You broke the laws.

I can't blame you,
She is a lot better.
Now she's taking you,
And there is nothing I can do but let her.

So what do you do?
Cheat on me behind my back?
Go ahead have your fun,
While I'm stuck and still like a filled up sack.

I guess I'm not meant to be happy,
My life is terribly sad.
Everything starts all great,
Then ends up bad.