DEAR ABBY: I’m 17. My mom and I often disagree on things. Don’t get me wrong — I don’t care what she does in her free time, but lately I have learned she’s talking to people about bisexuality. I don’t know how to handle this or how to talk to her about it. I feel betrayed. When I told her I was gay, she rejected my sexuality, and now she’s possibly wanting relationships with other females? Even now, when we watch the news and something about the LGBT community comes on, she still mutters about marriage being between one man ...