i love hem but i don't

me and my boyfriend well ex now had been going straight for almost a year.he knows everything about me and i know everythiong about hem.but one day it just changed whenever i got around hem i felt wierd.and i don't know why i hate it i love hem so much but then agian i don't.do you know why i feel this way?

i already ruined it.thankyou so much for your advise but i just already made the biggest mistake of my life!please help i think he hates me now!!!