Cut Them Off

I find it incredibly hard to "cut someone off" 

I feel it is really permanently losing off all the possibilities and opportunities of person in the rest of your existence. What are the chances of seeing this person again in your life? What does the experiences together amount to? The buildup of what could've been ended so abruptly. 

I find it pretty hard to reallyy understand how others could do this so easily. While I can understand many of people's reasoning to this, I honestly just can't find myself doing it. It's giving up so easy. 

Perhaps tho I'm just an entirely too attached person.