It means exactly what you think it means: he’s not into you, never will be, and honestly hopes to live and die without hearing the sound of your voice making him feel awkward. BUT, it’s important to him that you know he’s not a complete tool.
For whatever reason, it wasn’t working for him, but he knows you’re a fine person. It’s like leaving a mint on your pillow the morning after, or a courtesy cologne spray in a public restroom. He’s come, done his business, and is ready to move on. But he’d like to do so without breaking your heart.
My advice would be to think of him in whatever way helps you get past this. If you need to hate his guts for a few days, do that (but ONLY for a few days, or you’re just hurting yourself). If you’d rather believe he fell into a web of international intrigue and must abandon his throbbing love for you in order to save the moon from certain destruction, that’s a good one too.
In the end, you guys were ships passing in the night. Hopefully you learned something from the experience, if only that it IS possible to break up with someone, lie to them politely, and separate with no real animosity between you. Don’t read into it though, and don’t try to hold him to it. Sounds like the dude is gone.