I am very sorry for you, Cham.
What you are saying does make sense to me: that, for you, "marriage" and "being married" are special things, and somehow much more important and precious than, and beyond, 'being in a relationship' with someone. And you feel that, having got married in circumstances where you couldn't call up (and, it definitely sounds, didn't feel) those particular precious values, that "being married" for you is simply - hollow.
I totally understand that; but - I think that, if you weren't feeling hollow about something else, you wouldn't be feeling hollow about your legal status (which is all "marriage" is, if one is blunt & objective about it). So. I think you are feeling desperately hollow ... and you have lit on your marriage certificate as a nearly obsessive focus of why you are feeling hollow. But I am quite sure it (the marriage certificate) isn't the culprit.
And I think that, rather than an internet forum, or quick fixes like online quickie divorce ideas, you very deeply need counselling to find out what is making you feel so altogther hollow. I really hope you get to the bottom of it, as you sound like a very thoughtful, earnest, person. I wish you the very best.