Days come and go but my feelings for you are forever

Have you ever met someone and, regardless of how long you were together or how long you've been apart, you just can't get them off your mind? That's my problem these days I haven't been with him in over a year but lately I'm thinking about him more than ever and I have no clue why. It's funny because things were never all that fantastic between us. We fought constantly whenever we weren't physically together. Which might have been the other problem: it was a long distance thing. I don't know. But lately I can't get him off my mind ever. All day long, whenever I give my brain a break, it goes directly to thoughts of him. What is he doing? How is he doing? Does he ever think of me? And night is even worse cuz I can't control my dreams. And he's always there. Thankfully it doesn't really hurt too much these days, it's just slightly frustrating because I can't talk to him and I'm fairly sure he doesn't think about me at all these days. But I believe he's happy and liking where his life is at now. That's all that really matters, right? I love him, but I can't have him. But as long as he's happy, I can deal with that :)