My ex is still into me!!!!

okay so my ex-boyfriend (who cheated on me and then broke up with me) just broke up with the girl he was cheating on me with!And I thought he would never like me again and I was off the hook but the first hint came when he ran up to me in the cafeteria at school and asked if I had seen his friend I said no and gave him a puzzled look after a few seconds he left.I gave the lunch lady a look that said "I wish he would stop being a weirdo"
then the lunch lady said "He just wants to see your beautiful eyes!" she laughed and I rolled my eyes thinking I've been there done that!next thing are class was going on a field trip and he kept running into me on purpose!so in the hotel I hate to prank him a few times(which I did)

Next they had a concert at school and I was sitting with my mom's friend Kat.So he keeps passing me saying weird stuff!then Kat says "he totally likes you1" right about then I was ready to puke! heres the thing he's a jerk!I don't want him back and the other thing is im a Christian and he's not so I can't because my parents said so! my real question is...HOW DO I GET RID OIF HIM?!BECAUSE NOW HE'S COMING BETWEEN ME AND MY CRUSH!!!!