What should i do? how do i get through it?

im a sophmore now in highschool. during freshmen year i dated this girl, megan, we dated for 9 months. i lived in wisconsin at the time and eventually i moved to northcarolina, a month upon moving here she found out i had cheated on her while i was in wisconsin so she left me, and ofcourse i tried to get her back which was unsuccessful. our relationship had always had some pain in it but there were also really good times, i dont know i guess it was a little shakey because we seemed to have hurt each other alot. but anywayys months later she started talking to me again and we continue to talk to this day. i never threw anything she got me away, it all currently sits in a box within my closet that i have hidden so well. i havent tried to be in a relationship since, it was the only relationship ive ever cheated in so it really made me kind of wonder about my own identity and how well i thought i knew myself. so ever since ive been purposely remaining single in order to understand why i did it and what issues i have and ive been trying to find myself basically and solve those issues. ive never gotten over her though, ive tried to forget everthing that ever happened between us and everything that was ever said. until recently last night, i had done a good job at that. but then i was searching through my closet and out pops a picture of us at homecoming. suddenly memories, feelings, guilt, everything came back. i still have strong feelings for her though its been 7 months since we split up. i just want suggestions on how i could possibly get over her, and move forward in my life. i told my parents of this and they said i possibly could have loved or still do love her, however i dont believe in love at my age what with hormones and all that other crazy bullshit. i just call it strong attraction, or better yet its just infatuation,puppy love. i didnt sleep that night, and i only read one line "without you here, nothing seems to make sense...im more alone when im in a crowd of people than i am in my room, i miss you jake." and its been in my head ever since. just please, give advice in order to help me press forward with my life