This guy that i love keeps on giving me mixed signals... help!?

if a guy keeps on asking and uming that you already have a boyfriend, that youve already forgotten him, and so on. what does it mean? this guy that i love who didnt choose me because he still loves his girlfriend but is having a complicated and rocky relationship, keeps on sending mixed signals. i dunno what he feels for me. everytime i go online, he wants to see me, he keeps on saying he misses me ( bec he's abroad ) and always avoids any topic abt his girlfriend! he once told me that his relationship wid his gf is hopeless and he's about to give up. i just feel im being used and i dont want that! but i love him...