Daniel,
it can be very easy to fall into a depression, at any age for different reasons.
This is a time in your life when you are discoving yourself and your happiness; searching for meaning and purpose to life.
You need to take full control as a Christian and not find temporary, meaningless things to fill the voids in your life.
Music is good.
I love music, but search it out thoughtfully.
Never choose something only because it makes you feel a part of something.
Many people have been led down wrong paths by something they thought was perfectly innocent, in order to bring instant gratification.
God has to be your focus first.
Let him guide you.
Don't mess with the drugs or the things that possibly appear to stand for God behind a guise.
I want to say that I am very proud of you being 17 and choosing Christianity.
Now, don't let satan mislead you through your innocense.
Love, Violet