You will be a really lucky lady if your man simply tells you that he wants commitment. However, not all of us are so fortunate. Sometimes, desperate measures are called for if you hope to get a ring on your finger.
Look for signs that he is really into you and wants to settle down. Does he want to meet your parents? How do you get on with his close friends? How do you interact in daily activities? Does he include you in his future plans? Can he put his needs aside for your sake?
If you are unsure, maybe you can give him some subtle hints about your intention. Let him know your feelings and see how he reacts.
In the end, if your boyfriend just can't bring himself to commit then perhaps it's time for you to reevaluate your relationship.