Nick can be a very kind loving compassionate person, but if you don't spend enough time with him you will make him "less interested" in you. Nick is a funny person who has a normal amount of confidence and is super kind , but very weird in a good way. Nick is super social...
Nick also has a bad side, he can break your heart. If you don't become friends and talk a decent amount of time then you may loose a friend, maybe even more.
But you can determine Nick's personality by being yourself around him because he is an easy person to get along with.