In SF if you go to the wharf youre right by hella restraunts and touristy stuff; wax museum, Ripley's Believe it or Not, hella shops, hella restraunts, lots of over priced stuff but fun none the less. And its right next to Pier 39. Haight Ashbury is fun to walk around, lots of cool shops, Ameoba Records, and its right by the park. The Westfield mall on Market is cool, and youre right by The Crazy Horse and Market St Cinema if yall are into that, and Broadway is a short drive away; they got all the strip clubs and porno stores you could ask for. Alcatraz is cool, but Id buy tickets in advance because they sell out sometimes. SF is a good place for food too, you can get good ______ food pretty much everywhere.
You could also go across the bridge to Oakland, I would recomend the Zoo there over the one in SF, and I prefer the chinese restaunts in Oakland's chinatown to SF's, downtown and Jack London Square is kinda cool, and there is an ice skating rink near there if you and your girl would wanna do that. And you can drive to Berkeley from Oakland.
If you wanted to go down to San Jose theres clubs and shit downtown, the great mall is in Milpitas, and the Winchester Mystery House is down there. And the Exploratorium is cool.
Other than that theres fun shit to get into all over the place, you shouldnt get bored at all, everywhere theres something else to see or do.