I never really fully understood the concept of falling in love or even the thought that surrounds it. 
"I love you", I whispered to Ten before falling asleep in his arms. "I love you too... so damn much", he whispered back caressing my hair.

The thing when they say that falling in love is feeling happy regardless of what you do, no matter how simple. 
"You lose! I win", I exclaimed dancing around in front of Ten. "Fine fine, you'll always be my number 1", he said pulling me close stopping me from dancing. "I better be", I smiled before sticking my tongue out. "You're so cute", he said pinching my cheek. “Are you mad”, I asked removing his fingers. “Madly in love with you? Heck yeah I am”, he said making me laugh. “You’re so cringey”, I replied. “But you like it”, he teased. “Oh stop that”, I laughed as he did too.

That caring for the person endlessly to the point that you put their needs first than your own.
"Hey! Don't skip meals! We might be new to this trainee life but don't skip meals", I scolded Ten the moment I heard him say that he want to stay in the practice room during dinner time. "But I don't have anything with me right now", he said. "Here, take this. Eat up", I said tossing him my packed food. "But this is yours", he said. "I'm good", I said even though I was starving. "Look who's to talk about eating", Ten laughed making me feel awkward. "Come here, let's share this", he said sitting down. “So why are you scolding me just now”, he asked as soon as I sat down beside him. “Just because”, I answered in an unsure tone. “You talk about not skipping meals but you’re one to skip too”, he stated. “Is it wrong that I care for you”, I now asked as he looked at me. “You care about me”, he asked surprised. “Oh don’t act so surprised”, I laughed.
That wanting to see the person everyday, regardless of the occasion, you still long for their presence.
"Ten! Where are you", I yelled through the phone. "I'm sorry, something came up, I won't be able to attend classes today", Ten said seeming as if he was in a hurry. "Alright", I simply said even though I was actually looking forward to spending another day with him. I can’t control him, I have no right to. "Talk to you later", he said before hanging up. What could be so important? I can’t let this thought consume me for the rest of the day. If he says something came up then something came up.

That wanting to do everything for that person too. Even to intentionally free your schedule for them.
“Hey, you have plans after this”, Ten asked. Well, I was planning on studying for the finals. If he asks me out and I accept, I won’t be able to study. “Jae? I just wanna ask if you’re down to have dinner with me”, he now asked seeing that I gave no response. “Sure”, I unintentionally answered too fast. “Great”, he responded. What happened to studying? Great indeed.
And just simply having to feel being head over heels over that person.
"Why do you keep calling for Ten in your sleep", Jaehyun asked as soon as head down the stairs. "Huh", I asked sitting across from him at the dining table. "When I walked pass your bedroom I heard you calling out his name multiple times", Jaehyun said handing me my coffee. "Must be a nightmare", I said trying to hide my smile. “If it’s a nightmare then why are you smiling right now”, my brother now asked. “Who’s smiling”, I asked back facing him as I bit the corners of my lips from the inside to revert my smile. “Oh I don’t know, maybe Mark is”, he now laughed. Was I too obvious? Gosh darn it.
I finally felt it. I finally experienced it all with one person. I've never felt this happy before.
“Oh? You’re smiling”, Jaehyun said making me panic all of a sudden. “What is it to you”, I tried to hide it by frowning. “Is it Ten”, he now asked making me feel uneasy. “If he makes you that happy, then go for it”, he said. “Shut up”, I yelled before running up to my room. “You can’t deny it little sister”, I heard him yell before I enter my room. He’s right. I can’t deny the fact that he makes me so damn happy.
But I should have known. Everything was just too good to be true. And that nothing good stays with me. That moment that everything went pitch black for me was the moment I finally realized...
That at the end of the day, all I have is myself. 
Guess it's now time to use my brain instead of my heart.
Maybe it's finally time that I live by the sun and give up loving by the moon.