Does he love me or her?

I been together with someone more than a year. He seemed serious abt me but maybe Im not really that certain after all. He has a girl friend.Not me.Someone else. When we 1st started, i felt toyed.He spent little time with me. Called me once and probably met up every once a mth.However mths ltr, things change.We started meeting up more often. His tone filled with jealousy when realised i was on good terms with another guy.He pulled me back.Im glad he did.We became more attached, but I can't go to his house and his friends dunno of my existence.I feel miserable, even at this point. He ured me he's not playing with me and he never get near to tat girl friend of his since.Though not meeting her 1to1, he appear to be protecting her from harm but hurting me instead in the course.He says he knows but he dunno how pain it feels inside me. We quarrel alot to the extend he shouted he couldn't stand me anymore and walk away.Yet he still call to make sure im home after tat.He love me or her?