am I in the wrong

My relationship is dead. He constantly looks at other girls and brings her up in every conversation we have. Ever since he's met her he would stop talking to me and I know I've said it once but EVERY time he needs me it's about this girl (who I don't know and he refuses to tell me who it is). I'm about to hit my limit and end things with him but I still love him. I have tried to express how it makes me feel but he is in too much of a haze to even realize that I care