You don't just wake up one day married. Its steps. You meet. You date. You get serious and committed. You get engaged. You get married.
I dont believe just cause you are not married there is no commitment. Otherwise no one would be married as there would be no commitment foundation from dating to lead to marriage.
Absolutely correct. You meet someone you like and you decide to spend more time getting to know her. As you do that, you see whether your first impressions were correct. She may have been on her best behavior, you will find that out soon enough.
Over time, if you continue to see her, you will want to gradually migrate from casual dating (freeloader) to a exclusive dating (renter) relationship. As you do this, your conversations will need to get more serious as you probe things like her belief in marriage and commitment. You will also start practicing some important skills like Honesty and Openness and the Policy of Joint Agreement. The idea of this period, which should last at least a year but no more than two, is to interview each other as potential lifetime marriage partners. Any doubt during this time means that the interview process has failed and the relationship is called off.
If she passes the test, your relationship will have passed from renter to buyer. The requirement is that each of you put the other's needs ahead of your own. The evidence of this will be in your marriage vows.
So yes, there is commitment prior to marriage but it is partial. There is an exit available if things are not as they seem. That is one of the reasons why living together before marriage is such a terrible idea; the decision to act as married comes before the commitment is made so the renter relationship becomes entrenched with all the entitlement baggage that goes with that.