Hang in there. I know how you feel. My H never left home. He has responded positively to my changes but sometimes, espcially lately I feel I may be slipping up or not doing enough.
But don't be so hard on yourself. The positives are that you are very much aware of what you need to be doing to keep the positive changes going. Take a deep breath and just keep Dbing as best you can.
Try not to go overboard, pray and just put your best foot forward.
With regard to the feelings of clingyness and needing reassurance. This was/is a big issue for me too. I realised that a lot of the time I was not looking to meet H's needs so much as get my own bottomless need for reassurance met.
Often this would happen when I was really stressed out about other things. Once you are aware of how you are feeling make a concious effort not to seek to cling to your H or get reassurance from him.
Ask yourself if what you want to do is for that purpose or really taking your H's needs into account. And if its about your clingyness or neediness don't do it. Find some other way to get those feelings soothed. Call a friend. Listen to some music or do something fun.
Do not lean on your H for this. If we put ourselves in their shoes it would be very trying and draining to deal with our neediness etc.