If you could turn back to 7 years ago, why would you have made another decision? You would still have been the 'you' that you were back then and would have had no new information to choose differently.
Having gone through what you went through, *now* you have different information that enables you to make *different* life choices and positively carve your (new) future.
And sorry but 1.5 years of marriage does not condemn you to stay forever in a relationship where you aren't happy. 34 is young! You have your whole life ahead of you.
Do you want to go 7 more years in this stalemate and regret your decision 7 years down the line? You would only repeat the very thing you are now saying you regret.. Make the change now and don't foster even more regret.