Are you referring to Crystal Meth (Amphetamines)?
I have been clean from using meth, alcohol, and prescription drugs for around 18 months or so now.
I was like you, very depressed. I didn't much like the company of others, even family. I'd get the drug and go icelate sitting on my computer.
You need professional help to not only beat the addiction to this drug, but for the emotional issues you are suffering through as well. Many times substance abuse is masking much larger issues.
You are not alone, here if you need support.