Hi, I am also from California (Bay Area). I moved here when I was 27 (got a job in Zurich). That was about 20 years ago. Here are a few ideas:
- check out
www.naturfreunde.ch they organise all sorts of nature-related activites, outings and courses (it's a German language site)
- give private conversational English lessons (advertise in Migros, charge 50 CHF per hour, meet in cafes)
- take a dance course with your significant other
- travel like crazy on the weekends (Paris, Prague, Florence, Ticino, French part.
- take advantage of all the hiking, biking and skiing
- German class...lots of others in the same boat
The bottom line: if you have plans on staying here permanantly with a Swiss bf you will have to integrate with the Swiss. That is difficult, and you must speak good high German and understand dialect.
Quickest way: marriage and kids. Then the society will suck you in like a black hole.
Otherwise, spend the first few years taking advantage of all the travel and attractions of living in Switzerland. You will either adapt, or leave within 3 years.