When do you know it's time to give up on asking a girl out?

There's this girl that I have been after since the end of January this year. I found her on MySpace and even got to talking with one of her friends, also found through MySpace. I just recently found out through her friend that this girl I really like is not attracted to me physically. However, she has not told me directly to my face or through email or by phone that she doesn't want anything to do with me. I knew from the beginning that it was my appearance that would deter her from going out with me. Besides physical appearance, I think I'm a great guy.

All I'm asking is should I continue to pursue this girl even though she actually hasn't said that she doesn't want anything to do with me.
Updates
+1 y
I forgot to mention that I didn't find this woman through JUST MySpace. I actually met her 3 years ago when her and I were once coworkers.
Updates
+1 y
21 views and 0 comments. You've got to be kidding me.
Updates
+1 y
107 views, wow I didn't know this question was that popular.
Updates
+1 y
Please stop answering. It's over.
When do you know it's time to give up on asking a girl out?
Post Opinion