As I focus on Devin, I get that his feelings aren’t very deep, definitely not near as intense as your feelings for him. He thinks of you from time to time but he is not mature enough to focus on a “grown-up” relationship. If he was with you, he wouldn’t be reliable and chances are he would not be faithful. Find the strength within yourself to move one and get past this longing that you have. I see nothing good can come from it.