Guys: why would he do this? help thanks easy 10 pts!?

my ex broke up with me months ago. So we tried being friends and it did not work out. He has been stressed A LOT i know...but still he should not take his anger out on me. I told him last week to stop messing with me and just delete my number and goodbye. okay, he texts me 3 days ago and i ignored it and he texts me today and i asked him why does he need to text me and he said idk. and i asked him why hasnt he deleted my number like i asked him and he said why. i told him goodbye(again) and said that ill see him at school in the fall and asked him to not text my phone again and thanks:) and he hasnt text back(thank god).I told him i have moved on and im happy and i told him to text other girls and to stop bugging me and he said whatever. is he still stuck on me? does he want me back?