is there anyway to adjust the clutch to feel heavier (like a german car), and not so sensitive, without buying a new clutch??

 

Not really. Just like a German car, the clutch pedal force depends on the springs in the pressure plate.

 

I'd imagine that if you put a larger return spring on the pedal itself that would add some tension to the feeling... at the top of the pedal inside the car should be a spring, just try to get one that is a slightly larger guage and try that