What you will do is learn to live with the idea that what you had was great while it lasted but now it is time to move on. Like a day at Disneyland, it was fun and you wish you didnt have to leave but the reality is, you were not able to stay. So you walk out those gates with a smile on your face and the knowledge that one day, youll return again. It may not be the same place, but you know what you are looking for and you wont settle for anything less.
Yes it will hurt and you will want that to end. It will. But, as cheesy as it sounds, the pain is the proof that what you had was worth it. If it didnt hurt, the relationship would not have been good enough. Its the price we pay.
So, remember the good times and smile. Reflect on the bad and think of what youll do different next time. Then take a walk and get some sun. Read some poetry or write some of your own (even if its shitty, who cares?! Its just for you). When the thoughts come back embrace them, cry and start the process over. Every time you do this the pain will lessen until you realise that, while you will not get over them, you will be ok. Youll realise that you are strong, important and worth it.
You may like to read : how to get ex back now