Confidence?

I live by the rationale that:

"a man can says 'I love you' to me today, he can also says 'I love you' to another woman tomorrow"

Why do i have this rationale that i believe in?

Simple,

1. i need to protect myself.
2. there is nothing in this world that is definite.
3. Things change, people change.
4. i do believe in fairytales ending but wat are the chances that could happen to anyone?
5. Love is something that no insurance co will insure. Well, because it is even harder to predict than (or rather....unpredictable at ALL )than illness.
6. Man will always be a Man. That's why they are called Man.
7. I have seen and heard cases of affairs and high turnover rate of my friend relationships.
8. Not until the last min, no one knows wats going to happen. Even if its the moment, things can still change.
9. No one can say that he/she is going to love only that One person for the rest of his/ her life.
10. Anyone is able to justifiy their own actions and words.

Could it be because i have no confidence?