<human>: Give me a shortened version of the text

I have this friend from high school who I occasionally enjoy spending time with, but she can also be very irritating. She has a lot of friends and always talks about everyone and tells me confidential stuff about herself and others. The past few years we haven't seen each other frequently, we kind of grew apart.    We were both a part of a group of girls who stuck together and I voluntarily dropped out of the group, and now I'm only seeing this particular friend.

My problem is that she is expecting an invitation for my wedding next year, but I don't really want her to participate. My reasons are:

1. She always brags about how popular she is and how many random weddings she has attended. It really bothers me and I feel like a need to crush her ego a little. Yeah I know it is a bit immature, but I am sure you know a person like this.

2. My wedding won't be fairy-tale-like. My fiancé and I have small families and almost no friends (we're both introverts). Also we have no ambitions of spending lot of money on the wedding. I imagine I'll be constantly nervous on my big day because of all the imperfections, and how much she'll talk to others about it.

3. I really don't like her boyfriend. But don't  think I can invite her without telling her to not bring a plus 1.

My question is, how can I tell her that she is not invited to my wedding without hurting her feelings? Even though we have some issues, she is still my friend and I enjoy spending time with her once in a while, and most important she's one of the only friends I left.
<bot>: How do I tell my gossiping friend that I don't  want her at my wedding without  hurting her feelings.