Don't worry about the haters on the forums. If you're posting for advice, or possibly hoping that your friend will see your thread since he was once an active member on here, than why listen to these people who live thousands of miles away.

You sound like you're living you life fine for the time being, some friends come and go and the only thing you can do is adapt accordingly. I don't know anything about your friend so I can't really give any advice other than just talk to him and find out what made him change his mind so suddenly. As far as smoking weed in these amounts, what's there to stop you from doing so? If there's no negative resulting from your actions, then their is no reason to cease from doing what you want to do, eh?