How To Get Rid Of My Spots?

Hi, i am 17 Years of age, I Have been gettins on my face ever since i was about 14/15 they seem to get really bad alot of the time, i don't understand why because i drink lots of water, exercise and use Tea tree oil and a witch stick and nothing seems to be working, i think i have only clear skin around once since i was 14/15. When i have spotty skin it really knocks my confidence i feel like everyone is looking at my spots and not me,