I still think that you benefit from seeing a professional. You might not feel depressed but you likely are. Depression manifests itself in many different ways including loss of interest in things and boredom.

You absolutely can see a therapist with NHS. I have a close family member in UK and I travel there fairly often (usually annually) and familiar how things work. She saw a therapist through NHS on three separate occasions, all three times were short term therapy but very beneficial. And no she doesn’t have mental illness. I’d speak to your GP.

Not sure why you assume money would solve your issue. Money rarely solve anything. Some wealthy people suffer from depression and loss of interest and boredom and yet many middle class and pretty poor people enjoy their life. Clearly money isn’t an issue.

It’s nice to have more money but you can practice radical acceptance. Accept what’s there and what can’t be there and go live your life or seek help. Don’t know how old you are but you won’t live forever