What can I do about my depression, and my lack of communication to my parents?

Unfortunately you can't get help without your parents, but you can talk to a counselor at school..The counselor can recommend you need to seek professional help..Parents sometimes forget what it's like to be a teenager and maybe they didn't have all the anxiety you have , so they don't think it's anything but teen hormones..Don't give up seeking help. If talking to the counselor doesn't work then I suggest you call 911 and tell them you don't want to live anymore..that will definitely get your parents attention..Please don't harm yourself..Life is such a blessing and Your needed here on earth..Good Luck to you.