Why do some women view men who share how they feel as less manly?

I tend to share what iam feeling about the person i care for not all the time but often. I have lost and seen many people lose people in less then a flash so i tend to hold on to those i care for. Yet my best friend this was one of the factors that would make her never consider dating me again she feels its role reversal. What i don't get and she knows my life the things i have overcome, the fights i have fought, hell i even broke up a gun point robbery. She knows iam tough. Working 16 hour days and doing school is normal to me. I pay my house bills for the family she knows who iam, she knows i don't talk about how i feel to many people yet that is a factor? I also tend to joke and talk alot but that's when iam out because 9 times out of ten iam serious. i don't get it. Shouldn't your day to day working, handling your business and not backing down from a challenge be what shows your a man? I never give up and i step up and become a leader in bad sitautions yet she is not the first girl i know who thinks this way ( i have asked)