I missed my court date. Am I going to jail?

If they catch you? You'll wind up in juvenile detention. If you go talk with them? Then likely you will simply get a new court date (after paying a bond fee) You need to go get this taken care of. You have a bench warrant out for your arrest since you didn't appear. It won't just go away if you ignore it. Definitely be proactive about it rather than just sit around waiting for something to happen.