I used to feel like this. I remember having similar feelings about my husband - that I couldn’t bear the idea of him even
looking at another woman. I was unable to enjoy the nice times because I was preoccupied by the idea of it all ending - I felt as though letting myself enjoy things would just make me more vulnerable to being hurt. Like you, I’d considered leaving because I was so sure an end was inevitable that I just wanted it out of the way. We have been together since I was 16, he is - actually - the only person who has loved me unconditionally but of course, that’s why I was so afraid of him leaving.
What I didn’t realise was that it was a new expression of my OCD. I’ve had OCD since early childhood, complicated by sexual abuse and abandonment issues. I’d never had a marriage or child before so of course I’d never experienced that particular form of OCD before. In hindsight, I can see that the textbook intrusive thoughts and sense of impending doom were there - it just took me a while to realise that it was less about an actual ‘threat’ (my husband has only ever been wonderful!) and more about a lifelong issue presenting in a new way.
Once I realised, I immediately started medication and took myself back to CBT. And honestly, it has changed everything. I promise. These fears consumed me and I almost destroyed my relationship with my husband - that’s the thing with OCD, it tortures you until the things you worry about become a self-fulfilling prophecy. I look back and I am so thankful that my husband gave me a chance to sort myself out - I was a nightmare to be with, I’m sure. I’m so glad that I managed to take control of it because I doubt my relationship would have lasted otherwise. I would have driven myself and my husband to breaking point.
I say all this just to let you know that it is possible to go from being so anxious and so exhausted to being genuinely at peace. It takes work but it is so, so worth it to reach a point where you can just enjoy your relationship for what it is. I honestly completely trust my husband now and I can enjoy being with him - whether it’s forever or just until tomorrow.
You can get to that place, I promise. You deserve to enjoy loving and being loved. You don’t need to be the only woman to exist in your husband’s universe for him to love you - he will love you anyway, you are not inferior.
Seek help, you’ll be so glad that you did. 💐💐💐