Do i have depression? because i easily get sad, and im ussually antisocial

It's possible: Later adolescence is a difficult time for many and depression can be a part of the struggle: where am i going with my life? Relationships, school, etc. To determine if this is clinical depression, best to see a psychologist or psychiatrist for evaluation and treatment. But first see your physician since there can be medical reasons for your symptoms.

Need morinformation: Please don't diagnose yourself with illness you might not have see professional first see social worker or psychologist later on if you need medications than consider psychiatrist depression is different than antisocial.