Part of coming to terms with drug addiction is recognizing that experiencing these emotions is going to happen. Be prepared for them, and recognize them when they're present. Knowing what's happening can help you guide yourself through these emotions and work your way back toward the relative emotional calm of sobriety. There are many emotions that someone on drugs feels in regards to their life and addiction, but we can tell you about 4.
At first, it's very hard to admit that there's a problem. Maybe you fell into addiction gradually, and there really wasn't a problem at first. Even if this is so, continuing to make excuses for yourself and deciding that you don't really need to change is definitely denial. If an addict takes an honest look at his or her life, however, they can come to this realization far sooner.
The more serious consequences rear their heads, is fear. You might be afraid of the effect you're having on your family and friends or your career. You're afraid that you're going to ruin your life, and you don't know what to do about it. Even more terrifying is that drug abuse kills people every single day. It's a real possibility that your drug use could eventually harm you or kill you, too. If you don't die, you will be afraid till the day you simply no longer care about your future.
Drug addicts can feel angry at the world and at themselves. You could be angry at the people around you who are worried about you. Whatever were the causes of your particular brand of addiction, it's not going to help you to blame the people around you or yourself. It's okay to be angry at your addiction instead, as long as you're willing to do something about it.
Facing your addiction can give you the hope that you can do something about it. Utilize this hope and seek professional help to get into drug rehabilitation. There are much stronger, better emotions waiting for you once you reach sobriety.