Can I widen my eyes horizontally and vertically? (photos)

I think your eyes are beautiful the way they are.  I would go to a makeup counter at a department store and have a makeup expert help you find eye makeup/mascara/eyeliner to make your eyes stand out.  I would not advise surgery for you.  Good luck.  

Bigger eyes will make you look frightened.  That will not make you look attractive.  There is noting wrong with your eyes.  If you are spending more than an hour a day thinking about this, you might have body dysmorphic disorder.  Rather than surgery, working with a psychologist can be helpful to deal with the feelings.

Your eyes look beautiful and symmetrical.  I can't think of any way to improve them.  You have been born with excellent anatomy so be careful about altering it as any alteration may not maintain the same smooth shape and balance.