This is going to sound extremely harsh but I have to say it.
My brother has been smoking weed since he was 13. He is now 23. He tells us he doesn't smoke it very often but we know that he smokes it every day. It has ruined his whole life. He has developed epilepsy and bipolar disorder and is extremely aggressive. Now, being only 13 years of age when he became dependent on it, we have no idea whether he would have ended up with these problems or not regardless of his weed habit, but I would hazard a guess and say I doubt very much he would be anything like he is now if he had never taken the stuff.
He cannot work, he has no friends and he has no hobbies. He lives off benefits which he spends entirely on weed, and when he has spent that my Mum foolishly gives him more money (hundreds of pounds) which he spends on yet more weed. He lives in a tiny flat and has a bed, a sofa and a TV stand, he can't afford more furniture. He recently spent his ?800 furniture grant from the government on x box games which he then traded for (you guessed it) more weed. I learned long ago not to give him money or anything of material value because he will use it to get more drugs. I don't get him birthday or Christmas presents, the only thing I buy for him is food.
He is very thin and malnourished and looks extremely ill and unhealthy. He hates his life and has nothing to live for. He self-harms and thinks about suicide (obviously we are helping him as much as we are able to but it's very difficult to help someone who doesn't want to help himself).
Anyway - anyone who says marijuana is not addictive is an idiot. My brother is living proof that it is addictive. If not the drug itself then whatever they mix in with it (which includes rat poison as a bulking agent, btw, according to my pharmacist). If you want to flush your life down the toilet and make everyone around you depressed and anxious, not to mention waste thousands of pounds of tax-payer's money, oh and get arrested for petty crimes, then go ahead. You smoke that weed. You smoke it until you're bored of it and want to try something harder. You ruin your whole life, lose any career prospects or personal relationships you have at the moment, go ahead! But don't say I didn't inform you of what might happen.
To the person who originally posted: I am sorry that you are going through this. I really, really hope your boyfriend kicks the habit and gets better soon. I can't imagine what it must be doing for his Diabetes but hopefully he'll be ok.
Sorry for the tone of this message but it pees me off when people make light of drug addiction.