How do i stop feeling bad about being used?

I have been seeing a guy on and off for a year. He lied to me, told me he wanted a relationship and wasnt seeing anyone else. This morning after being intimate with him last night, i saw a used condom wrapper on his floor. Were not exclusive though so its not cheating. I just feel horrible for believing him. I texted him saying i saw it and he didnt say anything. He even made his facebook status that he loves life. So he really doesnt give a **** about me and im in love with him, but i have to move on. I think i only put up with him because of loneliness, but i rather be alone than sleeping with a guy who could give me something. How do i cope with the pain? It makes it so difficult to move on.