Unresolved emotions can really bring a person down. As well as mixed signals and keeping another person hanging, waiting..
I think it's best to never give oneself to anyone away completely. . A person has to be always prepared, having one's own happiness not depended on anyone else under any circumstances. In case the worst happens right away the life needs to start over again, from scratch. Everything needs to get buried, locked up, conclusions made to never go back for anything that might still feel as missing.. Have to be rational. Kill the pain. Kill all the sprouts that took place in your soul, treat them like weeds.. Gotta rip it all off as fast as possible and move on. Better run away for sometime, away from the habitat that was previously known only in one way. This is no longer home.. Sometimes it takes rebuilding one's own character from scratch. Unfortunately, almost everyone has to go through an experience of that kind and it's important to learn the ropes right off, have the survival mechanisms tuned and in check.
I used to be very emotional, very loving and selfless.. Too many times before I had to go through this with pain and agony, persistent sickness with inability to sleep, eat, live to the point that a person who I was is long time dead now and I am just the sprout of that other, clearer, kinder, majestic being. A little more than a shadow of my former self.. At least now I know that I am strong, self-sustained. I knew love and it was beautiful and knowing it once is enough and way better than not knowing it all. This memory needs to be cherished as it made me human. . I was in such deep darkness, one more step and I would not be here due to my weakness and inability to cope. And yet I am here, wise, cold and strong. I could be a warrior or I could be a priest because I am complete.
Women have a gift of creation and they also have a deep gift of a curse of destruction that not every man can withstand. Worse then wars or killing. Almost like having this woman in a way becoming your mother (in an abstract way, not quite Freudian) and much more than that as she nourishes and loves you unconditionally, makes you tame, gives you peace, gives you satisfaction.. and then she as easily can take it all away. Which feels as the ultimate rejection. As being expelled from heaven, God, having no longer a purpose in life.. That could be too much to handle.
Thus a man needs to be careful.