HELPPPP

This guy we're basically datinf at school we kiss and hug and we hangout 24/7, We say love you to each other we're both realy clingy then today I asked him if he likes anyone else other than me and he said "idk" then i said that sounds like a "ye" so then he was like "omg no i honestly dont know" what does that mean? why would he say no like does he like someone and just lying by saying no?