I'm 15 and I play Minecraft. Is that worrying?

Also I really am depressed because I got banned from a Minecraft server, is that a sign of an addiction

No. A video game is a video game. There's a lot of people that are in their 20s and still play Minecraft! You shouldn't get depressed over getting banned from a server. There's thousands of other servers out there!

Video games are entertainment. Nothing more. Depending on what you did depends on why you got banned from Mincraft. The amount of hours you spend playing it may determine if you're depressed

Quite possibly so… Who knows.