The Reds will kick-off next term in League Two for the first time in three years after Sunday’s 2-1 home defeat by Coventry consigned them to the drop.
“In the end we got beaten and were relegated and everyone is devastated – the manager, staff, fans, players as a unit,” said defender Bradley.
“It’s heartbreaking stuff, especially after going 1-0 up and looking comfortable.
“We have a few weeks off now to rest our legs and we will be back stronger. I’m definitely here next season, there are eight or nine of us who will be here, some very good players.
“I know the fans will stay with us, they’ve been fantastic home and away. We’ll come back stronger and I’ll be very confident we can deliver next season.”