[ Singles & Dating ] Open Question : how do i forget about him?

okay well there is this guy that i have liked since 7th grade im going into 9th now, we dated in january when i was in 8th grade and he wanted to go back out with me in june but now he is ignoring me so i think its best to forget him? i need some opinions if i should forget him, and how i can because i just cant get him out of my head, he has a facebook and i always go to his profile to see what hes up to. should i delete him? i still have his number and i occasionally text him just to see if he will reply but he never does. okay well i have his number memorized but should i delete it out of my phone so its like hes not in my life anymore? i need help fast!