Weird mouse(computer mouse, not animal) problem

Whenever I click the left button on my mouse it registers as a double click on my computer.
Also, if I'm trying to drag a selection somewhere it "unclicks" even though I'm not letting go of the button.
I'm hoping this is a problem with my computer rather then my mouse.
I can probably fix it if its a computer issue, but I can't afford a new mouse.
Any ideas?
Also, if I'm trying to drag a selection somewhere it "unclicks" even though I'm not letting go of the button.
I'm hoping this is a problem with my computer rather then my mouse.
I can probably fix it if its a computer issue, but I can't afford a new mouse.
Any ideas?