Way too general a question. Any number of things could have been wrong with the relationship, the woman or the man.
Stop talking Not communicating with each other.
Not following or understanding each
Others dreams or plans.
For me not wanting life's adventure to end so Soon .
Same question to you
Theres something your not doing they wish you would or they have fallen in love with someone else.
It is over...
Honey... If he left u, this is his loss... I know you may be hurting, but the real loss is his. . . Without knowing more about the two of you and how things were left, all I can say is "In my experience if one leaves the situation usually something is missing." I don't know if you two were dating and ended, then he left. Or if he just bailed.
I am sorry your hurting...
Love and Lack of Communication