Woman tired of connecting friends at her own expense

DEAR ABBY: I’m an outgoing person with a lot of friends, but I have begun being “ghosted” after setting up or facilitating an introduction between male and female friends. This has happened more than once when I’m pretty good friends with the guy. I introduce him to a female friend or colleague and encourage their relationship, only to have him tell me she isn’t comfortable with his being my friend, gets jealous, etc.