Why do some people drink alone ?

Possibly, but both are factors.

 

Some people just enjoy their own company, I do too. Not drinking specifically.

 

I drink alone time to time but I will only have a couple beers. Usually I drink alone just if I've had a long day or something like that.

 

Might enjoy the taste so much that it's their favorite beverage. Could also want to unwind after a long or stressful day.

Some people just need it in their lives.

 

I dont drink but my brother does. And he drinks alone because hes not a fun drink be around and has no friends because of his problem.

 

They may want to 'drown sorrows', they may be alcoholics, they may enjoy the taste/feeling. Who knows, everyones different

 

And there is a difference between a beer or two and 20.