There's something sad happening

There's something sad happening.
In the smiles, you used to give.
The laughter we used to share.
You say that everything is okay,
But I know better,
We were partners, remember?

I gave my all to you honey,
Is it her?
The one you said that I shouldn't be jealous of,
The one that was my friend.

That smile I said before,
I can see it when you talk to her.
I'm not oblivious to the way you look at each other.
You say that you'll never let me go,
But you're already doing this.

I'm lost.
I lost.
The one I loved the most,
you.