If you feel like you should take a break, then by all means do so. I take a break every now and then and it does wonders for getting me even higher when I start back up.

There's no reason to encourage him to keep smoking if he is having doubts about it interfering with his education. It probably is one factors that has led to your low GPA this semester. You are paying for school now, so perhaps you may want to cut back on something that's holding you back.

Not everybody is the same when it comes to weed and school.