What are the pros and cons of it?

I have recently been very sad and not at all happy with my life. I don't have a lot of friends, never had a boyfriend, and am just really lonely. My home life is great, my parents love my siblings and I. It's just really devastating that I'm not the happy girl I used to be. The few friends I do have have recommended I go out more and I have, which has helped but I can't always go out. So one of my friends told me marijuana might help with my sadness. I have thought about it but don't know what to do. My parents aren't interested in drugs and don't have any idea that I'm sad so what should I do? Also, I wouldn't know where to get it and I want some pure drug not laced with something else.
What are the pros and cons of it?
Post Opinion