Hey mang I can relate to this problem because heaps of my mates only like going out if they get themselves hammered.
One thing I have found though is that with the right state of mind you dont have to drink anything to have more fun than the drunken people by your side. I discovered this after many nights being the designated driver.
If you are old enough to hit clubs etc, i would recommend going out one night, not drinking at all, take a friend if you feel more comfortable and arrange your night in this order.
Firstly if your friend wants a drink to get their dutch courage up let them, then hit the dance floor and just go wild. If you get yourself having a good time and elevated on fun, positive mindset your more likely to be more confident and laid back.
From there just enjoy your night like you might be when drinking. Sarge if you feel the need but don't make it a necessity. Just have yourself a great time, dancing, chatting to people, watch your drunken friend get up to drunken mischief. The more fun you see you can have whilst sober the more confident and out going you will become.
Well thats just in my experience.
Either that or just cut down on the drink every time you go out. Have a few less every time. 1. you save money. 2. you get used to sarging with less dutch courage.
I hope I have given a few good points for you mang.