There are different ways of breaking up. Some people would simply disappear without saying anything about the breakup. Some would hang on because he/she doesn't want to break up with you.Some people will give you a piece meal information when you ask them.
I think at this juncture of breakup we have to be more understanding. We have to explain to them the reasons for breakup in detail. The person will in great pain. If possible request him/her for breakup and set you free. He/she will understand you and will be happy to let you go. Tell them that you have shared good times together and had so much fun. Maybe write him/her a letter and explain to him/her in detail for the detail. Please be honest about everything you write and tell the person. That way, it will be easier for both of you. There won't be so much pain in the breakup. It will be easier for other person to heal the heart and move on fast. That person won't lose trust. I have met heart broken people online and they are still struck in pain and couldn't move on because their breakup has not be proper and good.
Let us be little more kinder by being honest and talking to them in person then just disappearing when breakup. I pray that breakup do not happen in the first place.