places to meet people

It definetely depends on where you stay. In large cities like Berne or Zurich it should not be a big problem to make friends, because people living there are usually open-minded. But in rural areas people are more reserved and conservative. Some of them might look a little bit strange at foreigners.
But young people usually like to meet people from abroad.

Why not check the internet for events (parties, concerts, discos) in your area?
Young people in switzerland spend a lot of their freetime going out..

Some very popular databases for events in Switzerland are the following sites:

www.partyguide.ch
www.tilllate.ch
www.events.ch

p.s. if youd like to experience switzerland from another side, go visit the street parade (largest techno-parade in the world, about 1 million people dancing in the streets. more infos: www.streetparade.com)