The idiom "Digging Up Bones" refers to someone dwelling on a long-past relationship which he/she regrets losing.
Breaking up with a significant other and thinking about all the good times you shared together on Valentines Day or their Birthday etc. would be considered "Digging Up Bones."
Boys who enjoy yaoi (a genre in Japan that contains sexual and/or romantic relations between two men); literally translates to "rotten boy"; corresponding female : fujoshi