left side command button isn't working

So yesterday I started having a few problems with my macbook. The first issue was every time I hit 'f' it would do the formula f. Now when I try to copy and paste using the left command button its not working. But the right side one works. I use the left one.. Any ideas what could be causing this problem, or do you think I should bring it into the store. It's a little over a year, and up to date with all updates. I haven't spilled or dropped my macbook.

Sounds as if your keyboard is failing. This is part of the top case, the only fix is to replace it.