man i was going thru the exact same thing about a month ago. everything was so obvious and depressing. the pointlessnesss of life was just so simple. i didnt stop smoking but cut back alot. i stopped focusing on weed so much and more on my life. my gf is my life and weed is only something i do when i really want to.

you need to be positive even if it seems impossible, because when your depressed, nothing gets done and it doesnt help anybody. nobody will want to be around you and you'll just get more and more depressed. even if life seems pointless, just try to live a good life anyways.