I think if you wanted to break up being a nutcase would work well, quite well:
1. Our stars will never be aligned for us to have a solid relationship.
2. The numbers of your year of birth, month and day combined completely contradicts mine. According to numerology we will hate each other and I can't be with some one I hate
3. According to our palm readings we are not destined to be together. You can't fight destiny!
4. I remember being with your mother in my past life
5. Or if you want her to dump you.
Slip cassually that you are converting to Islam and the reason is that you can have no regrets about having four wives in the future
Don't cry, don't regret and don't blame
Weak find the whip, willing find freedom
Towards the sun, carry your name
In warm hands you are given
Ask the wind for the way
Uncertainty's gone, your path will unravel
Accept all as it is and do not blame
God or the Devil
~Born to Live - Mavrik~