I love him bu he has a girlfriend idk what to do please help me .?

well i love him. i know i love him. ive never met him buh we could meet buh now he has a girlfriend. he always told me hed kiss me if we met before he had a girlfriend. i just want to stop talking to him because all he talks about is his gor;friend and hes so inlove with her buh she isnt inlove with him itll take her five hours to call him back and he IMs me so upset and it hurts me so badly knowing how upset he is over her ive cried because of how he treats her can someone please tell me what to do because im so confused !