The immediate effect of the break-up would be pain. Will you be able to take the pain? The pain would go away slowly over a number of years, but the initial impact will be high. You will have to gather all your energy and tolerate the pain.
The second effect would be bitterness and blame. You will non stop think about the behavior of your ex partner and fix blame everywhere. You will recap all the arguments and fights and there will be a large amount of self-talk about how you were ditched. That will not be a pleasant experience. You will have to find way out of all this by spending quality time with friends, involving you in new activities, and keep yourself busy. Are you ready for that?
The major effect would be the temptation to join immediately with anew partner. This can work both the ways. Some people never wish to form a relationship again after undergoing the trauma, while some want to form a relationship as soon as possible to forget the earlier one. Both of theses choices carry danger. The best alternative is to wait for sometime and when you find your stability and self esteem back, try and form another relationship. Are you ready for this?