From my experience, that sounds more like just getting fed up with your environment. I feel the same way, completely seperated from everyone else anymore... instead of focusing on the drugs, look at your environment. Look at your relationships with others, and how you are at school, work, etc. Try and find ways how those interactions may cause you to feel sad, low-esteem, or as if you're a blue-stick person among all red-stick people.

Once you rule any of that out, then maybe the cannabis is causing it. How often do you smoke, on average?