Friendship

There's a girl I've known since last September and she new about me ttc and getting engaged and my cousin and me used t b really close but ever since me and my cousin and drifted my friend went and told her about me being engaged and my cousin told her parents and her parents (my aunt an uncle) told my parents I had to deny the whole thing and I told my cousin about me ttc and she again went and told her parents who told my parents and again I had to deny the whole thing so I am no longer involved with my cousin never want to be to me she is a slimey bitch and my friend well we haven't spoke since we left college and she texted me today asking could she stay in my house for a day because she is in a bad place and tbh I'm letting her but I feel like I can't be friends with her anymore be cause I told her about my engagement in confidence and she told me it 'slipped out' when she was talking about me behind my back to my cousin on the bus can I have opinions on what you ladies would do in this situation thanks xx