Stay Or Go?

Every time I see your face,
I long for your embrace.
Even though you hurt me really bad
I still want the love we once had.
As time slowly drags on,
I die with every minute that you're gone.
I know I can never change you,
I just wish you'd feel the way I do.
This, I know, will never be
But for some reason, I still love you.
There's something that's keeping me here
I need you even after every tear.
In my mind, I know you cheated on me
But in my heart, I know this cannot be
This confusion has sent me on a ride
And it's getting harder and harder to hide.
Please tell me what I need to do,
Can I really stay and believe you?