Callmegoogle its good to know that your precious tears didn't go to waste.
I see nothing wrong with this spell as long as it is done with a strong will and from the bottom of your heart. Who is to say that tear drop is not as strong as a drop of blood used in blood magic. If you can't see the magic in a bottle, how do you see it in ritual objects? Ritual objects are tools, just like the glass bottle in this case. The only key to a spell, ritual or even prayer is belief and intention. If you believe that a glass bottle and tear drop acts as a medium between you and the universe, I dont see why this spell wouldn't work.
Speaking of intention and belief, specially with a wish spell, you can't be asking for the impossible. For instance you can't physically transform into a dog, cat, fairy, wolf or vampire. You can't snap your fingers and control the weather or pull out a rabbit from someone's behind. Try not to be that silly, not just with spells but with everything.
As far as Gods and Goddesses go, there is absolutely no problem if you call upon on them or ask them to help you in time of need.Drawing gods, goddesses, angels, demons and animals is in a ritual is fine. But you should feel connected to who you are calling. Just mentioning them in an incantation without believing in them is like adding special effects that are not effective. All of them are perhaps as powerful as you want them to be.
So make a wish upon a falling star, candle flame, tear drop or a birthday cake, cast a spell if you like. Believe that your wishes will be granted and that you deserve what you wished for. I'll keep my fingers crossed for you ;)