How do i hint to my friend that i want to be invited to her party?

Im very hurt and confused because one of my best friends is having a major fourth of july party this sunday and she invited literaly everyone but me! I have no idea why because we never got in a fight and the last i saw her we had such a great time..just as normal friends would. So the fact that she invited everyone else but me really hurts and doesnt make sence. Im hanging out with her tomorrow so i need advice on how to hint to her i know about the party, and i really wanna go. Im so upset and i dont wanna miss out on the fun. Please help!