My self confidence helps me feel attractive. What boalsters yours?
For me, little things like exercise, taking care of how I look (and for me this doesn't mean lots of $$$ on trendy stuff) and laughter. I have an amazing (if not quirky) sense of humor and it's no surprise that people find that comfortable. Not all to be sure, but enough for me.
My age may give me a biological advantage as well as a mental one. I'm 52 and while I like how I look, there is room for improvement and those things that are important to me I work on.
I will tell you that I know I'm attractive b/c of the way people respond to me.