How could i get my hansom, intellegent 17 yr old son out of his room?

Why do you ask?: I gather that Junior is not socializing with others or taking part in activities outside the home. I cannot tell you why this is, and being a family member doesn't guarantee understanding. In fact, he may not understand his behavior, either. You've already talked to him and he's not changing. He may be introverted, have schizophrenia, have agoraphobia, or just prefer solitude.