Okay, but I disagree. Even if people disagree with you, they admire your ability to be okay with being different than others (confidence, once again). Also, asking a woman out does not limit the dating pool. The woman subconsciously knows whether or not she'd say yes before you ask. How you're percieved by others is pretty much ingrained in people within a fairly short time of meeting them, IMO. And many women would still love to have a guy as a friend when they don't like them as boyfriends. I don't recommend this unless you LIKE having your heart ripped out, but its still an option.
And all of my words to describe women intentionally didn't reference looks. A hottie girl to me is one that knows who John Coltrane is, and can hold interesting conversation. There was a girl I met who was actually physically not all that great, but I thought she was a hottie cause she played bass in a band (rock stars get all the action). That told me she'd be fun to hang around.
Dude, just ask. You can rationalize not asking her all you want (and I do this too, I'm not above being afraid), but understand the only person you are harming by not going after what you want is yourself. She will not appreciate you not asking, nor will anyone else for that matter.
Also, don't wait too long to ask a woman out. You need to be giving her signs from the get go that you like her romantically. And if you do this long enough without asking her out, she'll just think you're a tease or a flirt, and not give you the time of day. Of course this is just my experiences, yours could be different.