Hi mate. The cannabis probably has something to do with it, but it is hard to be sure with so little to go on. (Twenty-five to 30 times in three years doesn't tell me how much each time.)

Thirty sessions of 20 cones smoked alone is a lot different to 30 sessions sharing a joint with three mates; and 30 sessions of hash is different to 30 lots of marijuana. There could be lots of other factors coming into play as well, like whether there was tobacco or other drugs in the mix.

At 16, your brain is still "plastic"—it can be altered in many ways by experiences and by chemicals. It is different to the impact on a fully developed nervous system (that usually means over 25 years of age) and since you started using a lot younger than even 16, there is a chance that pot is part of the reason you are feeling this way.

The good news is that many young men go through a time like this at your age and pot had nothing to do with it. It is a stage of growing up and you are likely to come through it just as they did, provided you put yourself out there with your friends and try to get involved in the things they are into, even if at first you do feel different or bored.

The even better news is that, provided you do not use again, any negative things the marijuana was responsible for should eventually wear off, even though it may take a long time before you feel normal again.