Some may say the Soul never dies, this I imagine would mean it goes on forever. Supposing the Soul does go on forever, who is to say that you will remember what happened here once you move on to somewhere else?
Forever is for learning and as each, second, minute, hour, day, week, month, year passes by we are bound to learn new things, some will be great and some will be hard lessons.
I realize this is not helping your question, but forever is for you to use how you wish, people will come and go but you still go on, hopefully as a better person from what you have learned.
Forever is a long time and if our Souls go on past this life, look at it objectively, just as a flash in the pan. Enjoy the opportunities you are given and learn from any mistakes you make along the way.
Have faith, find the good that can come from today's heartache.
PS: Sometimes Love does last forever, especially perhaps from our creator.