What I mostly feel after I realize the person I like also likes me is... elation followed immediately by trepidation? I like dating but only people that I don't seriously consider a relationship with. The first while of "I like you, I know you like me" is just unnerving. After that it get's okay. I just like to know where I stand with people. Still it's fun and when things don't work out it's almost as good as when they do. Amusement factor and all. But in hindsight.
It's annoying because I'm pretty good at picking up. I just don't like the bit in between, asking out and in a relationship. So I tend to freak out and then people think I'm crazy because I purposefully act vague to distance myself from people and conflict.