Sorry this happened to you.

But this sounds like fading - slowly reducing your presence in someone's life.

Ghosting is different. I once introduced my girlfriend to a friend of mine and I could feel the cold wind blow through the room.

Later she told me that when she had lived in Chicago, they had started dating, and then he'd simply vanished with no warning after a couple of weeks.

It turned out that he met her a few weeks before a planned move to NYC and simply didn't tell her anything about it.

Your guy sounds like a wuss, but still, slowly backing away over months isn't ghosting. (Still, it's rude and unacceptable in polite company. Breaking up is painful but it isn't that hard, and it's an obligation.)