Hey UdHitIt,
I lived a similar life when I was your age - until I was 22... I was going to night clubs, private parties, bars, etc. pretty much every day. Unfortunately, I could financially afford such a lifestyle and I was surrounded by a good crowd of people who were seemingly happy to live this life. I never stopped to think about where this was going. I was enjoying the ride and had a fantastic time!!!
Throughout most of my years at university I continued partying like there was no tomorrow. Look, I really think I know where you are coming from and why you don't see a problem with what you are doing. There is, however, a catch to your philosophy: There is a tomorrow. You need to think about the future and find a balance in your life, otherwise things are going to end up in a very bad way, trust me.
After seeing people close to me running into serious debt, becoming mentally unstable, going to rehab etc. I decided to put an end to my habits. It was damn hard to stop - this is the point when you notice how messed up you've actually become. I'm not an unintelligent person. Still, it took me three years to recognise and admit to myself that I was actually destroying my body and helping others to destroy themselves...
Once I stopped taking drugs, I drifted apart from the party crowd. I never thought this would happen. They were so cool and we had such great times. It turns out that what really tied most of us together were our addictions. I sometimes randomly bump into some of them now and I just notice how much the drugs have taken a toll on them. It really hurts seeing people that used to be smart, energetic and positive individuals turn into junkies.
It has been three years since I quit. I now have amazing friends (from the old school days, work, travelling). They are seriously cool people, much cooler than any of the people I hung out with in those years of hedonism. They are positive, intelligent and fun to be with. I am truly honoured to have them in my life. I graduated from university and have had great jobs. I go the gym a lot and I feel healthy and alive.
No, of course my life is not perfect... Still, I am so much more happy about who I am today, the people around me and my future, than I was back then.
Please do yourself a favour and think about a couple of things:
How dependent are you on these substances? Why can't you be happy without them?
Drugs are fun, but they end up having a lot of control over you. They twist your mind and it is very easy to convince yourself that you are happy... If you don't watch out, over time, you'll become emotionally and physically drained - you don't see this happening to yourself - and your party friends will not tell you, because then they would have to come to terms with the fact that they are going down that path as well...
Where do you see yourself in 5, 10, 20 years time? Do you maybe one day want to be in a stable relationship with a cool guy?
You won't have such a relationship unless you take a step back and sort yourself out. Furthermore, it is very unlikely that with a drug habit like yours, you will be able to save up any noteworthy amounts of money to buy a house, get yourself a nice car, go travelling, etc. Later in your life (should you not have overdosed by then) you may very well find yourself struggling to make ends meet, without real friends, regretting the choices you made when you were younger.
If you continue at your current rate of consumption, you will wake up one day and realise that the only way you can function to some degree is by having a few lines of coke and some vodka. Drugs will no longer be giving you the buzz they used to. You'll simply have become reliant on these substances to reach a normal state... Please don't let it come to that man!
As your friends and even parents like to party, it will be very hard to break out of this lifestyle. Take my word for it, it will be worth the struggle. You are a young guy and surely have the potential to achieve a lot in your life. Don't fuck up your future!