answer:If you are asking about guys in general in not committing, I believe it is an evolutionary thing. Men do not want to commit to just one partner right away especially at a young age because they want to “spread their seed” sort of speak. This means that males want to reproduce with a variety of partners so they can produce more babies that are like themselves. Females on the other hand want to be with fewer partners so they can nurture their kin. It is a males mission to reproduce with more people so that a variety of females can nurture their offspring to keep their genes going. As far as your situation, I believe that he does not want to commit because he is not ready to. It sounds like what the two of you have is good and he is content with it. I am sure he does not want to lose what you have, so a commitment may change things for him. It is a comfort zone type thing like the saying, “If it aint broke don’t fix it.” Taking things to the next level may complicate things for him and get him out of the comfort zone that he has with you.