<human>: Summarize the given text in a few sentences.

I should preface this that my family is LDS (mormon), I'm not anymore.

The last few years my brother has been smoking a significant amount of weed, and my parents found out about it a few months ago. He still lives with them, and they were very pissed and started drug testing him. Which he has failed multiple times. He has been getting a lot of crap from family lately. I think he is tired of the negative attention and has decided to throw me under the bus.

I live in an apartment and have been enjoying some new found freedom. I was also dating an old friend from high school who knows a lot of the same people I do around the start of this. He began assuming I was upset with him all the time, and tried guilty me into sending nudes by saying "Don't you like me enough?". So I stopped talking to him, turned him down, and even ignored his snap the other day. Well I pretty sure this guy told one of our mutual peers some things I would rather my parents not know about me. This may be complicated but I'm pretty sure the mutual peer told my brother. 

Now my brother told my parents that I've been drinking alchohol. My parents are acting disgusted towards me, even though I denied it because I don't want them in my business. Now my brother is saying he has even more secrets but is saving them until I do something to piss him off I guess. We're definitely not close, but I have no idea why he's doing this to me.

How do I handle this with my brother? Should I say anything to the guy who I was dating?
<bot>: My brother is practically blackmailing me with some secrets that I don't even know. He plans on telling my parents next time I piss him off.