<human>: Can you condense the text into a few key points?

I recently found out, from a large number of my friends, that the guy I am dating consumes weed on a regular basis. I don't do drugs or drink at all yet he does more frequently than I am comfortable with.

It is making me upset. Some people are telling me not to care while others are telling me i should. I don't want to say something because I sound like a bitch but if i don't say something then the issue may get worse.

It also worries me that I can't trust him as well. 

How do I deal with the situation?
<bot>: The guy I have recently started dating does weed and underage-drinks on a regular basis and it makes me loose trust in him and feel uncomfortable seeing I strictly don't do either. How do I deal with it?