Were it not for you

As usual, my boyfriend and I hugged each other one week before I left Japan. That day, I felt like he was sad about something. He hugged me and then collapsed onto the bed, on all fours over me. Oh, I see, we're going to be in a long-distance relationship soon, so my boyfriend must be lonely and not want to be away from me. I empathized with him, feeling that it would be lonely to be apart. And I felt sorry for leaving him in Japan. A few minutes later, when I was thinking about this, he suddenly stopped talking. I guessed that he was crying. Thinking of him like that made me sad too. My chest hurt and I was about to cry. I felt guilty about letting him in Japan. However, when I listened closely, I heard him snoring. Yes, he was just starting to sleep.
Yes, this was just my overthinking things.

What I wanted to say is he is so important and adorable to me.

I do love him. We broke up  1 month ago actually, but I still love him hands down. I really really love and miss my ex-boyfriend. It’s hard to keep a relationship with living in a different country better than I expected. Anyway, it's time to go to bed alone. How can I overcome this situation?