I know when my clutch blew 2 weeks ago...the car started, it ran, you could press the gas and it was like the car was in a permanent state of being idle. You could shift into any gear, but it wouldn't engage. You didn't even have to press the clutch to "shift" the shift knob, but it wouldn't allow the gear to actually engage.
As much as you don't want to hear this, it sounds like your clutch is fried. It sounds just like what happened to mine. It just stopped working one day.
5 Speed Manual
Alpine CDA-7895 Head Unit
12" Alpine Type-R, sealed box
Pioneer 400w amp for $20 at a yard sale (to replace my fried MRV-1507)
Infinity Kappa 4" 2-way speakers(rear)
Infinity Kappa 5.25" component speakers(front)
Debaffled airbox, K&N filter
Tracked Mud on carpets
Shampooed and cleaned carpets