Am I using my MBP too much?

Too much for what? For your health or the computer?
I used my previous MBP 2009 model for 3 years everyday for work and play, and it is still running fine. I rarely turned it off, ran it unplugged sometimes, and it still had 4 hours + of battery life when I retired it this Sept. The MBP is a very robust machine. As for you, someone is bound to jump in this thread with the usual "get a life" comment, and of course you should get some exercise too, sitting at a computer all day long is definitely not "good" for you!
Baring hardware issues, don't worry about your MBP, just run it sometimes on the battery and put it to sleep at night. If you have Apple Care, you have 3 years of support, so why worry now?

 

I have an Early 2008 15" MBP and has over 30K hours uptime so i think you and your Mac are safe to say the least

 

LOL.

It's called Internet addiction.

And have you notice EVERYBODY on their phone nowadays? like they are trying to ask you something but the phone is still on their hears. In my parents days that was rude.

But don't worry about the machine, it's designed to run 24x7 if you wish. Is your mid section that's getting extra fat cells.

 

Between both of my jobs (online of course), high school work, and leisure (I'm addicted), I spend about 9 hours a day on my MBP. Wow that's bad...

 

Macs can handle it

 

As always with these sorts of questions:
http://www.apple.com/batteries

 

My MBP 2011 is always awake or asleep!
If Im rendering videos, seeding torrents, exporting videos, etc, its on for nearly a week.

And I never let it shut down. Its always on sleep.
Also I havent cycled the battery for nearly 6 months now.

 

You paid your hard earned money for it, so use it as you see fit.

Modern electronic chips/circuits are designed to be stressed for decades before wearing off. Chances are, even with heavy usage, your MBP will wear out long after it becomes too slow to use with newer software.