I have bipolar disorder and find it impossible to learn in school. I am not stupid, but I can't focus and learn in public schools. I can't memorize information just to be put back on the standardized tests, and I cannot pull myself together enough to finish the countless number of assignments and papers.
The only person I was ever close to, a girl, has left me completely. She has changed and it makes me sad. She started smoking weed. She used to be the lightness in my life... a break from "drugs" and "bad things" I was always around... and now she is not like that anymore and she has left me.
Study outside of school. I'm bipolar also and I had no chance of learning when i was in class. I began studying outside of class instead of sitting on facebook all day and went from a C-D student to an A-B student in about two months.
Do them in segments. On longer assignments, I will have a breakdown if I try to force myself to sit there for hours on the same assignment. I find doing assignments in parts really helps.
Uh, you're talking about smoking weed now, so I don't see the problem. I have a friend who's been in and out of rehab since she was 10 (long story that I can't tell due to rules about other drugs) and what she does never affects me. If you don't want her to smoke around you, then just ask her not to smoke.