Feelings (this is kinda messed up)

What are your feelings towards me?
I really must know.
You know how I feel,
Because I have said I love you so.

You said we'd be together for ever,
Oh, how forever ended so fast.
I look at my boring life today
And all I see is a grey hazy cast.

I know now,
I know how you feel.
You said you liked my sister.
It just doesn't seem real.

I don't understand,
How you could ever do this to me.
I try talking to you
Just so I could make you see.

I have to forget about you,
And move on with my life now.
I have to forget the times we shared.
I have to, but I don't know how.