I have made three rules of writing for myself that are absolutes: Never take advice. Never show or discuss work in progress. Never answer a critic.
Raymond ChandlerLove interest nearly always weakens a mystery because it introduces a type of suspense that is antagonistic to the detective's struggle to solve the problem. It stacks the cards, and in nine cases out of ten, it eliminates at least two useful suspects. The only effective love interest is that which creates a personal hazard for the detective - but which, at the same time, you instinctively feel to be a mere episode. A really good detective never gets married.
Raymond Chandler