My eyelid on one eye is going up and it's making my eye open really wide, but why? (photos)

It is possible that you have a small degree of ptosis on the one eyelid that makes it fall lower across your eye.  This could account for the difference you see.  I would see an oculoplastic surgeon to have your eyes evaluated.  If you do have ptosis, this can be corrected with surgery.  

The low set eyelid on the right (ptosis) recruits the forehead muscle to compensate for the right eyelid muscle weaknes. As a result the eyebrow-eyelid soft tissue is shifted up with more exposure of the eyelid platform. The effect of forehead muscle overaction is felt on the left side and this leads to left eyelid retraction further exacerbating the asymmetry.

Hi. It looks like you have right upper eyelid ptosis in your recent photo. The other much less likely possibility is that you have mild left upper eyelid retraction. You appear to be young, so you need to be evaluated as to why this is happening. I would schedule a consultation with an oculoplastic surgeon, who are experts at eyelid disorders. Both ptosis and retraction can be corrected. Best regards, Ira Vidor, M.D.