The singer, who was found dead at her North London home aged just 27 earlier this month, had apparently accepted a secret proposal from the film director, and even had a diamond engagement ring.
A source told The Sun, 'Reg asked Amy and of course she said 'Yes'. She loved him.
'She wanted nothing more than to be his wife and to start a family with him. She wanted to get rid of her demons so badly.
'They openly said they wanted to spend the rest of their lives together. They both thought the absolute world of each other.
'Amy spent a week in rehab in June and told loved ones afterwards she was determined to quit booze.
'She was planning her future with Reg and that was playing a huge part in her thinking.
'Amy was adamant about sorting herself out. Reg's proposal made her even more determined. She didn't want to carry on the way she was.'