@ryanthonytx,
Two observations for you to think about.
First, you say you've only been dating for a couple of months. Do the two of you have any kind of agreement to go out exclusively? If now, then neither of you should get upset when the others goes out with someone else.
Second, it has only been a couple of months. Maybe she is not ready to fully commit to you. Maybe she has decided she does not want to commit to a relationship with you. TALK to her. Find out what she wants. Then, during this conversation, if you don't hear the answers you want or need to hear, you can simply tell her that you think it is best to end the relationship. That is how you do it without being an ass.
Good luck.