I used to hide all my emotions, but after the rug was pulled out from under me, I can't stop crying. I too, can go for hours at a time and no manner of rationalizing can stop it. I've come to beleive that it is by far healthier to feel the pain and cry it out, than to hold it in and explode later. Some of us just feel deeper, or some of us have low seretonin. See a doctor incase.