I found out my girldfriend is related me?

-I found out that her dad is my aunties husbands brother. Does this make her my cousin? :( what should I do?You are only related to someone if you share a common ancestor. The only family of your aunts and uncles by marriage that are related to you are the children, grandchildren etc they produce by the uncles and aunts who are siblings to your parents. For instance if your uncle by marriage and your aunt divorce he would no longer be your uncle, but she would still be your aunt.
> Does this make her my cousin?



No. She is your cousin's cousin. That is, she is cousin to the children of your auntie and her husband, through their father. You are also cousin to the children of your auntie and her husband, but through their mother. "Cousin's cousin" comes up here almost every week. While it is fun to say, it isn't a real relation.



What should I do?

Treat her with respect, make sure the conversation is about her, not you at least half of the time, let her pick the movie or restaurant once in a while. If you are rude - the example I always use is you try to set a county speed record for getting a bra off - your auntie will hear about it and you will be ashamed.
Your Fathers Auntie's Husband is not biological related to you. Consequently his brother is not biologically related to you either. So your girlfriend is not biologically related and even if she was the relationship would be so distant that it wouldn't matter much.
You are not blood relation. She is not your cousin. Do what you like, no blood involved. She is a cousin to your cousins [your Aunt's children] but not your cousin. OK?
uhhm she is not your cousin, go on continue your love for her.
You're really just distant in-laws. You don't have any blood relation to her.
yes. well its illegal to date your cousin.