I am planning revenge on cheating boyfriend by seducing his best pal

DEAR DEIDRE: I HAVE hatched the per­fect plan to get revenge on my soon-to-be ex.

I’m going to tempt his best friend and have sex with him and when my cheating, lying boyfriend finds out, I’ll let him know that I was simply giving him a taste of his own medicine.

I am 24, my boyfriend is 30 and we have been together for three years.

He was my first proper boyfriend, so I was probably quite naive.

When he said he was working late or going away with the lads for weekends, I believed him.