It should technically be "a lot", not "alot". I've never even seen a person use "allot" in that context, since it's a different word entirely.

Sorry, couldn't help myself.

Anyway, I genuinely hope that you'll be able to reach those goals you've set for yourself. The only thing I can suggest about the drug use (feel free to brush it off though, since I really wouldn't know what I'm talking about seeing as I've never used drugs before) is to either cut back gradually, or surround yourself with people who don't use. Or both, really.

Good luck.