Is it bad that I need glasses but I don't want to wear them? What are the effects of that? Would it worsen my vision?

Hard to say. If both eyes are at a similar strength the brain would probably just give you fuzzy vision.Over time, all vision can gradually change anyway.If one eye is stronger than the other, or gives a sharper image, the brain may eventually turn off the vision in the weaker eye.Without vision, that eye may no longer track or line up straight with the other, leaving you cross or wall eyed.