Friend sends mocking memes after venting session

DEAR HARRIETTE: I confided in someone I thought was a close friend about some pain points and concerns I experience with my brother. This was hard for me to do because I prefer not to discuss family matters with other people, but I guess I was feeling overwhelmed and really needed to vent in the moment. I thought I was in a safe space when I shared the sensitive things that have been going on with my family — boy, was I wrong.