Difficult break-up

I have a problem
I love one girl
Yet I date one boy

This girl I love
Knows the truth
She knows how I love her so

This boy I'm dating
I'm sure he can see
That my heart belongs to her

I know I should be fair
And leave him now
So he won't hurt as bad

But she dates another
And do i loathe him so
Each day I glare at him in hatred

We both know of our love
And long to be together
We keep waiting though

So we both have a problem
We love one girl
Yet date one boy