There's no denying it: Your 20's are a time of great changes. Between college, study abroad, and job offers, your life has the potential to bring you to new and exciting places. And as you go wherever life takes you, you'll find the hardest part of moving is often not what, but whom, you will leave behind.

For example: In three months, you have to leave your amazing study abroad experience (and the love you found) to go back home overseas. Or in a month, he leaves his home (and you) to go across the country to take that amazing job offer after graduation.

Whatever the case may be, perhaps one of the hardest situations we can find ourselves in has to do with relationships that have an "expiration date." These are relationships that must, for whatever reason, be cut short by uncontrollable and unchangeable circumstances.

So, what do you do?

Most likely, you'll be terrified. And your first instinct will be to save yourself the pain, to cut it off now so you won't hurt in the future. Driven by fear, you may subconsciously find yourself trying to push him or her away, hiding behind the walls you built to in order to shut them out.

But by trying to save yourself from future pain, you only create suffering in the present moment.

You will never know what would have happened if only you had been brave enough to push through that fear. Giving into that fear is like burning a book you never even bothered to open. And what pain could be worse that of knowing you willingly destroyed something you never even gave a chance?

It takes true courage to pursue something you are fully aware will end. It also makes every conversation, every kiss, and every second shared with them that much more precious. You will not take it for granted, but instead fully appreciate each and every moment shared with them.

And of course, it will seem like the universe is somehow against you. How can it be fair that something so beautiful must come to an end?

Well, maybe it isn't fair. Life often isn't. But it doesn't have to be, because somehow, it always finds a way to give you exactly what you need at the moment.

And it has given you someone who's engaged your head and heart in a battle, someone who will teach you more in a short amount of time than most long-term relationships ever could.

If you've been lucky enough to have found this person, why would you deny yourself the experience of sharing time, however short it may be, with them? I truly believe it is worth it.

We often forget that one day, we must end too. Our lives are fleeting and brilliant, and sometimes the love we experience is, too. We must remember that there's a reason that the days in our lives are numbered. So we can fully appreciate each and every moment, relationship, and experience for how beautiful it really is.