At Middle of the Ocean

  I understand that you love this man and I also understand how much you want him to be yours. The first thing you need to do is stop having physical contact with him.   This might feel risky to you, since you'll probably be thinking that the physical contact keeps him tied to you. Nothing could be farther from the truth. Men can engage in physical contact and have little to no emotional connection.   You have to have the courage to take a stand and make him choose. So long as you play around with him, you are saying that you are willing to be the other woman. If you want to be his one and only and you want him all for yourself, stop sharing him. Tell him that you care about him but that aren't willing to continue having physical contact with him unless you are exclusive.  

Taking this stand means that you respect yourself and that you deserve more. To choose you he has to respect you. Taking his leftovers is not respectful of yourself. You must make him choose. If, God forbid, he doesn't choose you, which would be painful, then at least you are not continuing to put yourself in a dangerous situation in which you will become more and more attached to a man who isn't willing to give you back all that you deserve.