Will I ever be back to normal?

A month and a half ago, I smoked a lot of weed (4 bong rips) and felt my first high. And it was kind of scary for me so I stopped and never touched it since. After like the third week, I felt super depressed and was down for a week. I couldn't get myself to eat right. Then I had to go back to summer school and since I kept myself busy its getting a lot better. When I was depressed nothing interested me at all. Also, there's been a lot of stressful things I have in my life. Choosing College, new housemates, etc. Yesterday, my best friend left for good and I felt sad once again and couldn't concentrate and I felt like I wasn't "here". I'm 16 so I have started to feel that time passes by super fast. Is this all from the weed? If so, if I don't touch weed, will I ever be back to normal? Thanks