How do I stay sober if my friends are drinking/using drugs?

The one thing you can always control is what situations you are putting yourself in. If you know your friends are drinking/using and you want to stay sober then remove yourself from the situation altogether by not going or simply leaving the area. You need know and be honest with yourself on how much control you think you will have when around certain environments. Also, your friends need to be aware of your intentions to be sober. Peer pressure doesn't end in high school.

Be mature and open about your boundaries, and never let embarrassment get in the way.

In my experiences I have come up with a few alternatives to indulging in the use of alcohol, weed, etc. While I do agree that "not being there" is perhaps the best way to avoid such temptations, it is easier said than done, especially if you are naturally a social person. For instance, ordering a cranberry juice or Coke at a bar is a good way to look natural while staying sober. Chewing gum might sound simple and pointless, but it can take your mind of the actions of others and keep you occupied. In the end it is really up to you do decide how you can stay sober in particular situations.

This is a major stumbling block for people trying to get sober and STAY sober. I finally realized that i had to change my definition of fun. Find new interests and consequently develop new friendships. In other words - leave my 'Drinking Friends' behind. Change your thoughts, change your life.

It depends on if you think you have a problem with alcohol. If you do stick with "the winners"...people and events that aren't centered around alcohol. Get with a therapist, and/or support group to help you talk about your concerns socializing with people who drink. Hang on to this revised version of the Serenity Prayer: God, grant me the serenity to accept the people I cannot change. The courage to change the ones I can, and the wisdom to know it's me.