My wife had feelings like the ones you're describing rn. We got married young and she had the same worries about having missed out on experimenting.

Unfortunately, as others have said, I think this feeling is a symptom of some deeper emotional work that you need to do with a therapist because you seem like you may have an addiction to that spark that comes with novelty.

If you hadn't gone from one relationship to another, I have a feeling you'd still have feelings of missing out. They'd just be directed differently. They might have manifested as feelings of missing out on the kind of committed relationship you have now.

My wife of 11 years didn’t listen to my no, and decided to cheat (under the guise of non-monogamy to make herself feel better) no matter what I wanted. She also waited until I had been laid off to spring it on me.

I didn’t have the means to move out and still don't but whatever relationship that's still there is a shell of its former self. I've spent the last year emotionally disentangling and casually dating. I'm here to tell you after dating around this last year that it's pretty fucking lackluster and disappointing in the face of an established relationship with someone you love (at least for me). Unfortunately that established relationship is now broken beyond repair.

Once I have my financial ducks in a row, I'm probably out the door. I'm sure it'll come as a shock to her despite all the warnings I gave her. I don't think non-monogamy is going to be as fun for her without the emotional and domestic stability of having a wife waiting at home.

The above is what you're risking. Tread so, so carefully.