i feel you might get mixed opinions on this depending on the height of the guy but I'm only 5'6 myself and I don't really like it when a girls taller than me but your only an inch taller so I don't think it would bother me that much, so long as your not a lot taller you'll be fine.
I Hope not... I'm 5'8". When you are with somebody it shouldn't matter that much, but (not trying to be shallow) but height can sometimes be a factor when you first meet. There are plenty of fish in the sea if you're looking for the right guy. I wouldn't think 5'7" is too tall. You just need a tall guy. :)
I'm your same height and I don't have any problems attracting men whether they're short or tall (although I do prefer men at least 5'10" otherwise I tower them in heels). Its not like you're super tall anyway, 5'7" is not that tall. You're fine, don't doubt yourself. I promise I have NEVER had a guy tell me I was too tall or had a shortage of men hitting on me. Be secure and confident in yourself. That's the most important thing anyway.