Most Helpful Guy
I don't think any 17 year old can say they are ugly. When you're that young your opinions of what's "beautiful" are pretty f***ed up to be honest. And you also have very limited experience in what guys actually find attractive. (It's a much wider spectrum than hollywood would have you believe.)
I'd say don't believe the bullsh*t that Hollywood tells you. Concentrate on having an attractive personality for the moment, and then you'll be pleasantly surprised when you find guys who are attracted to you.
There's a difference between thinking you're ugly and having no confidence as a result, and thinking you're ugly but accepting it. If you're in the second frame of mind, you'll find you never come across as desperate/needy. That is very close to confidence. It comes across as completely uncaring about your looks, so to speak. You'll be surprised how attractive that is, in itself. Guys can be very attracted to a woman who's comfortable in her own skin.
I know this seems like so much bullsh*t, coming from an adult who doesn't understand kids. But it happens to be true. Like many things adults try to tell kids, it's hard for kids to believe it while they are still kids. They have to learn the same lessons for themselves.