Just as a quick update to my "other issues".
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Anyway - we soldier on and I'll keep updating here.
Honestly, I think you need to stop updating here. You are using the anonymity of posting to avoid dealing with any of your own problems. There is nothing remotely financial about the advice you need to follow
You are blaming everyone else for your own problems but doing nothing about it. You are not a child, you are in your 40's.
Fear Obligation and Guilt are at play here.
People pleasing in the extreme is evident.
A CHOICE to martyr yourself vs stating your own needs.
A choice of relationship and partner that most echoes your dysfunctional primary relationship with your parents
A deeply enmeshed family system.
@Winkie has nailed it on the head with this
You are choosing not to act, for whatever reason we don't know. It has nothing to do with your parents.
It should all be very simple:
1. Move out, set a date in 1 month, take a short term lease anywhere.
2. Your parents have more than enough cash to support their own needs, let them do it
3. End it with your girlfriend or commit to it, floating along does nobody any favours
4. Do not move back in with your parents
5. Stop making excuses for literally every option available to you
You have a very odd relationship with your mother, will never be independant unless you stand up to her and call her bluff.
But you are not going to do any of those things...