So, I was walking to class and this guy made eye contact with me and growled, he smiled afterwords and then the next day and so on he would jump out at me, he always smiled. What does this mean and I'm honestly too much of a wimp to go up to him and ask him why, One time he passed by me and as i was turning he ran back and jumped at me? Is he flirting or am I just overthinking things? or is he just messing with me?