You could try talking to your friend, that is a girl, on a one-on-one basis to get her to notice you. Even though you might normally be good at this sort of thing, sometimes when you really like a girl it will be different.
bulliema nervosa
It seems like he likes you and he might not even notice that he's talking to her often. He might just want a friend that's not a girl friend but just a friend that's a girl if you know what I mean.
obsessive compulsive over eating Binge-eating disorder
That is because we don't notice Earth's rotation. To us, Earth seems to be static.
He could be interested in you more than a friend but in order to find out simply speak to him and just ask him if he is ok because he seems to be different some how and see how he responds.
It seems they have interest in them.
That actually depends. If you notice a full moon on the horizon, it seems bigger compared to other things on the horizon. When you notice the full moon closer to its zenith in the sky, it seems dwarfed by the vast expance of sky. The difference is an optical illusion.
Its kind of hard to find his best friend but Violet seems close enough to be his best friend
Some do, some don't. Everyone is different. He or she may, out of guilt, but you may notice that the person is not as open as before and seems to be distant -- not as much closeness as before. Or not.
It seems as though the girl wants you to notice her as she is interested in you.
This doesn't sound like an eating disorder (unless the friend is bingeing/purging) . It sounds like depression. When someone is depressed, they often gain weight and don't have the energy to lose the weight that they want to.
It seems they either are a little to close and expect it or they may like you more than a friend.