HOW COULD I

Love is a special thing between two people. So how could this happen to me?
How could I fall in love with someone who loves somebody else?
I know how I feel is just not right, you belong to her and I can't change that.
So why can't I let you go? Is it cause every time you touch my body I can't help but to fall deeper and deeper.
The thought of what we do makes me sick. So why can't I stop doing it?
Is it cause you say you care and that you will always be there.
Is that just a lie you tell me so I wont go.
In the moment I feel like we are two people in love, but when you leave and I know you go touch her the same way you touch me.
It makes me hate every moment I have with you.
The thought of you making love to her the same way you make love to me kills me deep inside.
To know that i'm not the one you love hurt like no other pain.
So why do I put myself through this pain?
Is it my heart playing games, making me want to believe that one day you will be mine.
My mind knows so different, you will never be mine.
Its like a fight I could never win. Like a storm that will never end.
I know I need to get out of this place I am in.
I try to run from it but I get no where but back into your arms.
When will this end. Will I ever stop loving you? Will you ever stop loving her?
I wish someone could tell me, how could I fall in love with you.