There are a lot of women out there who like different things. Sure the majority of women like the sterotypical tough guy, but there are others who like sweet, generous men. I would try to work on your insecurity and be comfortable with who you are. If you present yourself as a tough guy, and she expects that eventually the facade will change and you may not live up to her expectations. Present yourself as who you are and find someone who can except that.

This kind of reminds me of my high school art teacher. She was a very kind and gentle person. She was also veegan and pretty proactive about it. I can't imagine a girl like that dating a rough neck construction worker. There is someone for everyone out there. Just be yourself and learn to like who you are.