This definitely sounds like you have a drug problem and to be honest it sounds like you know you do but are afraid to admit it to yourself. This is a recipe for issues down the road, I have seen too many friends just like you OD and die or go through cycles of addiction and never achieve anything meaningful to them, leaving them feeling worthless and depressed.
There must be something you love that isn't drugs. Try to use that as a motivator to look forward to. Travel, photography, clothes, sports, film, dancing, anything.