I lost my virginity to a guy who had his girl & yet he would keep on coming back to me! what did he feel 4 me?

this guy meant lots 2 me! he had a girl when everything started but then he decided 2 leave her.We had been having ual several times & then All of a sudden he got a new girl! thats when i tought everything had ended between us! but 2 my surprise he came back 4 more! i dont know what 2 think! so please, please help!! i wanna know if he kept on coming back 4 more because he felt something 4 me or because he just needed someone 2 satisfy him!! I NEED LOVE ADVICE!