teenage life

At age of 13 that was almost 3 years ago I started searching something with my friends
and classmates something that help us realized what is a teenager mean to be within this period a teenager must enjoy life to the fullest;what I mean is enjoy studying and hopping with friends.

Now that I'm in my last year of my secondary education, I can see different improvements and activities of teenagers like me. in fact, some of us has already have girlfriends and boyfriends or what should i say is involving relationships, others started drinking liquors and smoking cigarettes which is rampant specially to those teenagers who are not in school, this should be stop; but how can I help to solve this issue?