I slept with my husband’s best friend – the guilt is eating me alive and I don’t know what to do

DEAR DEIDRE: SLEEPING with my husband’s best friend is the biggest mistake I’ve ever made. Now I feel sick every time the two of them are in the same room. I’m 41, my husband is 43, and we’ve been married for 17 years. We had a really happy relationship and until now I’d have described...