It seems you are at a transition in your life and that can be tough. As you described it, everything is in a flux of change new school, new place, new friends, and your old friendships are changing. Not only that, but you are in this more than friends, less than lovers relationship. Which is what? Is that best friends with benefits and you don’t know what the future of the relationship is? That really complicates things in life more than they already are. Its like a time buying device or just a matter of indecisiveness on his part, why is he ready for the physical, but not for the relationship? It’s like the old saying why buy the cow if you can have the milk for free?

As far as mental health and physical health are concerned these are things you must work on, neither are given to us with out work and dedication. Of course everything happening will affect how you take care of yourself, but if it is something you need to do then you have to find some way to make it into something you WANT to do. As your friends are concerned, friends grow apart and it sounds like you no longer find your friends interesting and they don’t understand how everything that is happening in your life is affecting you. Friendships are complicated, especially highschool and childhood friendships, people change and grow up. I don’t know how you were before, but maybe you were a push over who was always the one that listened to their problems and now you have your own problems to worry about that they have no one to complain to? It is fairly easy making friends in college as everyone is in the same boat. Stay positive, you are young and still have plenty of time to make friends and enjoy life!