Me and a married colleague were talking first a few months everyday for a few hrs at a time, I'm married too. We never spoke about our spouses but would talk about our lives, found we were quite similar and laughed alot. Physically attracted too. I suddenly realised the interaction we had was harmful, I started to resent my husband, idolised this person and was bereft if we didn't manage to talk or see one another. Realised nothing real could happen between us and we needed to stop, sent him a text telling him that we should not talk anymore as we talked alot, he was gracious, said he was surprised but understood where I was coming from. Neither of us openly acknowledged the emotional affair, we spoke alot and lots of looks, gazing and accidental touches, bit know that is a slippery slope. I feel bad for doing it via text and not calling him, I feel it dimishes the connection we had and feel guilty. I feel bad that he may be feeling suddenly cut off and sad. Advice to navigate how sad i feel and the guilt, feel like the end of a real realtionship and feels like grief. Do not plan to contact him again. No excuse how things developed, didn't see it coming, but feel very delicate so please be kind if you can, know that's lot to ask if you are the innocent partner on the other side.