Someone who is a friend to everyone makes none of them feel special.
If you are friendly to all other people,it just means you are trying to please everybody.No one is going to feel like you are their special friend.You must pick a few who you really like and stick with them through the thick and thin.Then you can consider yourself a true friend.In other words,you can only have one or two best friends.
*thick and thin 艰难险阻