Okay, then don't try to soft-soap your answer, nice guy.
You don't have to be crude, but just tell her you rather not, or "no thanks" or "I'll pass". Don't make up some excuse. As long as you give her soft-soap answers, instead of being more direct, she'll continue to think you'll be her BFF.
It is not about what you feel should work in your M. It is about doing the work that gets the right results. Do what works!
