My son is graduating this year from high school. And going to collage.has a part time job, about 30 hours a week. And is getting apartment with 2 other guys.Do I still pay child support.

What does the child support order say? Does it specify that you only have to pay until he reaches a certain age or when he graduates?

Generally, if he is completely out of the custodial parents house not just during the school year then support would stop. You will have to look at what your support order says because if it continues until 21 then you will have to go to court to have it stopped and bring your proof that he has moved out of the house for good with you.