What does "we are more than friends" mean?

what does it mean when a guy says that you're more than friends but not boyfriend and girlfriend. then when I asked him what that meant he said, "idk together"..then I said so were together but not together boyfriend and girlfriend and he said he's just as confused as I am and I asked him what he was confused about and he said "you". what is he so confused about?

is he like scared of a relationship or am I missing something else?

p.s..were definitely not fwb