Is it worth being friends ?

MY ex bf I want to know if it is worth being his friend ! He broke up with me on the phone because he said that I was a stalker ! I go to school with him I am 15 him 17 ! I think I was accused of being a stalker to him because I called him 3 times A day only because I caught him flirting with another girl on facebook about and I kept him around ! He does not say Hi to me in the hall ways or anything because I think he is mad at me ! Over facebook he called me a dum ***** ! I want to know If I should be is friend and if I can find someone in life better then him ! also he is my first bf and we lasted 5 months !