I have loved this guy for 5 years... pretty much my whole high schooling life went on always thinking about him...
He doesn't like/love me at alll... and I no it 100%...
I need to get over him because I cannot start a relationships because he is always on my mind.. I just don't no how to get over him

I know what you're saying I had this when I was in the 7th grade! To this day that guy is still attractive to me and he's the unknown.. untouchable I will never/have ever had! Basically all I can suggest is to let your mind feel it, and eventually it will settle a bit, but the feelings may never go away! Just take him down a bit from the pedastole you put him on and think there are so many other guys better than him that will give you a chance!