<human>: M/F (late 20's / early 30's). PhD students.

Me and my boyfriend have been in a 1.5 year relationship in which we have spent five months together - ten months long distance - three months together. 

I believe our relationship to be strong as we share the same life goals and religious beliefs, are highly sexually compatible, we share lots of interests and hobbies. He also treats me with great respect and care. He talks about a future with me and he introduced me to his family and friends in his country. 

However, there are two things that greatly worry me about him. He drinks  enough for me to believe that he might either be or be at risk of becoming an alcoholic. When he drinks he is never aggressive with me or others, actually he is what I would describe as a happy drunk. Though I have had no issues with him while he is drunk I do worry about the damage that he is doing to his liver (he often has to touch his liver to see if he can drink or not).  

The second thing that worries me is that when we are long distance he takes methadone. One of his neighbors provides this for him and he says it is only recreational. However, I did quick research on this and it seems that it is highly addictive and could be potentially lethal. 

I am obviously worried about his health but it is hard to asses his "addiction" since we don't live together for most of the year and I am quite ignorant to identify if it is or not a problem. I also love freedom in relationships and I would hate to have to act like his mom and tell him to stop drinking or taking whatever he wants if he starts to have health problems. I would of course support him completely if he asked for help. 

I have told him my concerns but he says I should not worry and that he will decrease both alcohol and methadone intake. Since we are again long distance I don't know how to approach this. Should I ask him about it or trust that he will take care of himself like he told me? I don't want to be controlling but I do worry because I love him.

Condense the text into a few key points
<bot>: Unsure if my boyfriend is dangerously addicted to alcohol and methadone and how to handle this. He is awesome in all other aspects.