I realised that I responded above but didn't really address your plea for help... I just wrote about my own experiences to show you that you aren't alone, to try to alleviate some of your stress. But it wasn't really that helpful. You are in a stressful situation and anecdotes aren't really relevant.
I always find that when I need to really reason with myself, asking myself lots of questions and writing down the answers as pros and cons can help me put it in perspective. So that's what I'm going to recommend you try. Maybe by reasoning with yourself you can move on.
Here goes. Ask yourself some questions:
- What is my interest? What do/did I want to achieve from pursuing it?
- What do I get, physically, mentally, spiritually, emotionally, from pursuit of the interest? (This is quite distinct from what you hope to achieve through the interest.) This can be positive or negative.
- Does what I gain from the interest benefit me in some way other than satisfying intellectual curiosity? Does it benefit my work life, home life, relationships, etc.?
- does it have disadvantages for my work life, home life, relationships, etc.? (You have already said yes to this, I think!)
- what are my reasons for wanting to stop?
- why can't I stop? As SignOfLazarus asked, what effect does denying myself time for my interest have on me?
- am I afraid of no longer spending time and energy on this interest? Why might I be afraid?
- Is there something else I can distract myself with? A big project (house renovation, repainting, etc.), a new or old hobby, planning for a trip somewhere, a family event, something I've been putting off for ages?
- Should I consider professional help, counselling? Should I give myself a time limit to move on from this?
I'm sure there are other questions you can ask. If I have repeated anything I apologise... I always find that rephrasing some questions to myself can help shift focus and provide clarity.
I really hope this helps.