Moving on does feel good.
Years ago, I had been in a relationship with a man, and the breakup could just never seem to be finalized, admittedly 99% on my part. I just couldn't let go.
Looking back, it was the fear of "What will happen next?"
Then, one day, while resting, I visualized me on a trapeze, swinging back and forth, stuck there.
I knew there was something out there to catch me (as life always does), I was just afraid to let go of what I was hanging on to.
For me, it gave me the courage to let go, figuratively be in the unknown, or nothing, for a bit, then firmly clasp on to the next thing in life.