Life can be very hard at times. I've been there too. Surround yourself with friends and forget about the crap.

And do see a doctor. People think depression is a mental state; it's not. It's a biological response that's just as real is any physical illness. It's now on every doctor's screening for new patients in the US, because it's so common and tangible. Here's a really good Stanford University lecture on depression that might help you (and others) understand and accept what it really is:

Good luck. I wish you all the best. Followed and upvoted.