hi yoyogirl
i can understand feeling left out due to the age gaps; however, the party is to celebrate your cousin. If you dont have a relationship with your cousin to be able to be there and focus on her day, then there really isnt a reason to go. just send along a card and gift with your parents. welcome to psych central. you will find we have several forums where you can post about your concerns and receive feedback from other members. you will get a lot of support here. again, welcome