IMO the lazy argument from men that any woman who dislikes another woman is doing so because they are jealous of her looks is on a par with the lazy argument from men that any woman who rejects their advances is a lesbian.
It is possible for females to have an opinion on another woman that is not based on her looks - either positively or negatively. In fact, in my experience, women are far less likely to dislike another woman solely because of her looks than men are to like her purely because of them.
And from what I remember of them, 19-20 were not the best of ages, so I really would not wish to revisit them or envy anyone who is them. Life is much better when you're old enough to know your own mind and be less susceptible to the opinions of others.
My impatience with Emily is down to her attitude and seeming lack of commitment. Contrast her 'but it really hurts' with Hayley (I think) a few weeks ago saying that she had to skate through the pain because it's what the pros do every day of their careers.
I disliked Colleen for this same 'I'm a wounded soldier' attitude last year - now tell me I'm jealous of her.