I was cheating on my boyfriend with a man who was engaged… but now I feel used and heartbroken

DEAR DEIDRE: I BETRAYED my boyfriend by starting a fling with an old pal I bumped into in a nightclub – even though he’s now engaged. But it’s backfired horribly and I’m the one left feeling hurt and used. The guy I cheated with had suggested we grab a drink to catch up and, because...