That seems to be the hardest part. Learning not to love someone who you feel so passionate about is so difficult. I can't offer anything because I still have not learned how to make it better. I can listen and say it's not you. You gave so much of yourself and at some point you have to stop giving because you have nothing left. Nobody deserves to feel low, everyone deserves happiness and sometimes it is scary to look back and realize you weren't really happy. Be strong and you will make it through to the other side. He will look back and it will be too late. Don't let his problems become yours. As you are told on a plane you must first help yourself or you can't help loved ones put on their oxygen. Focus on your oxygen