Am I being realistic in thinking this might work out.
not at all, it could. unrealistic would be pinning all your hopes on only this scenario occurring. if you don't want to live with him (which sounds wise) but don't want to divorce, and would rather watch and see whether still seeing each other works for you, then watch and see. You seem to be taking a number of steps to ensure your safety and serenity no matter what happens with him, or your future choices, which is great!
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