If he should be untrue to me, I should of course hate her.

I could not hate him.
I did not make myself love him.

I would never have been so great a fool as to bring that pain upon myself intentionally.

I suppose no girl would deliberately make herself love a man and bring into her heart so great an agony.

I feel toward John as I do, because I must; and I hate your Scottish mongrel because I must.