What kind of relationship commitment are you talking about? I'd strongly advise you not to get married until you reach your thirties. There are so many things you don't know about what can be had from a relationship. Playing the field is will teach you so much about yourself and what you value in a partner. If your commitment is merely not seeing others than that's fine. I think having a few meaningful long term relationships is great practice for settling down some day. When you start looking to settle down forever you should have few doubts in your choice, having finally found a person you don't want to live without.
NO MARRIAGE NO THANK YOU. Just being in a relationship as a general thing for more than, say, two or three months. I wouldn't say seeing others period but seeing someone and sticking with it for...however long. I have and have had no interest in marriage at least until I hit 30 unless something amazing happens, and possibly never because an institution I think it's silly. (also this is a not so subtle reminder to send me your Facebook page)