I am sad and I don't know why?

When i was in 7th grade this happened to me, i started to separate my self from everybody and eventually i had no friends just acquaintances. I started acting out and i got in a lot of trouble but then. I started talking to the school social worker and i became very close with her, she helped me with everything, but then i told her i wanted to commit suicide, she recommended i go to the hospital, their i met my psychiatrist he put me on 10mg of lexapro and let me tell you it was the best thing of my life, it helps with my depression and anxiety, go talk to somebody!! Please for me? trust me everything will get better