Macbook trackpad button is stuck down

the trackpad button seems to be stuck DOWN....if I'm on the desktop, it draws slecting boxes, if I'm on a web page it selects everything it touches....SOMETIMES I'm able to mash ESC to release it, but it kinda auto-selects again....basically I can't navigate very well at all....I never get respond if I press it? but I am using a USB mouse now, and it works, but of course I want to use the trackpad help me

This may be your answer: MacBook sticky trackpad button - iFixit But before I bought a new upper case, I'd pull the old one off and fiddle with it in case the problem is being caused by something that can be fixed by cleaning or simple mechanical repair.