How do i space out my relationship?

me and my girlfriend have spent pretty much ALL summer together, we've only been going out 5 months, i am extrememly worried about getting sick of her, i'm totally not sick of her though, she's unreal haa, i havent seen my friends as often as usual and same with her, i miss her all the time so it's hard to be away from her, and being with my friends gets boring, i want this relationship to last, a long time we're not in the same year at school so i only see her at breaktimes and lunchtimes and usually afterschool, i love seeing her after i've missed her because it's better, how do i get her off my mind when i'm doing other things, I MISS HER NOW!!!!!!!!!!!!!!!!!!!!! haha