Hun...You can't make someone be with you...If he really wanted to get back into a serious relationship with you...he would...He's treating you the way that you're allowing him to...He knows/thinks that you're ok with the way he's handling things and think it's ok to continue to do so...Trust me hun...I have learned from my own experiences and had to learn the hard way...He wants to continue to "do him"...like seeing other people and wants to continue to see you because he knows he has you under his wing and you're so willingly allowing him to come back...He's your ex for a reason and you need to sit back and think about that reason and analyze the relationship...It isn't going anywhere...You could either ask him why he keeps wanting to go back to you or just leave him alone...and trust me...I know it's much easier said then done...but at the end of the day...think about what you're putting your heart through...All the different mixed emotions this relationship is bringing in for you...Not worth it hun...Let him be...and if he really wants you back then let him work hard to get you back...and if he doesn't...trust me...you will know from his actions!