I received an invitation to a family friend's wedding. The bride is the younger sister of a kid I grew up with and whose parents I was very close with. I figured my brother (he is the same age as the bride) and my parents would be invited, but I was surprised to receive an invitation. I am getting married in June of next year and planned on inviting her parents and her brother, but not her. Do I politely decline going to the wedding knowing that I do not plan on inviting her to mine or to I graciously accept the invitation? Is it more rude to go or not to go?