Hi
I think that your are more open and honest than most guys and that they could very well see this as a bit frightening to be honest. Most guys (that I know) don't like to share thier emotions and try to act 'tough'.
I've been attracted to both 'bad boys' and then the nice guys too, I have to say tho I do have a string of 'guy' mates that are similar to what you said... nice guys that I feel lucky to be friends with.
As I get older I look (will look soon anyway) for different qualities in a man... and I like nice guys to be honest.
I have no advice other than just be yourself because there is nothing wrong with who you are or what you are.
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How I describe myself:
Honest, caring, trustworthy, reliable and generous.