“Missin’ You” is a song about longing for someone that you have are no longer in a relationship with.
The first verse talks about not being able to sleep because you are constantly thinking about this person. It’s a lot of staring at an empty ceiling and tossing and turning. You feel defeated because no matter how hard you try, you can’t get this person out of your mind.
The chorus talks about how the only way to get over this person is to stop thinking of him/her so much, but this is not an easy task.
The second verse talks about a month passing after the relationship ends. You tell yourself when you see it ending that you will be just fine. You tell yourself at the moment you say “goodbye,” that you will be okay. But now you know you’re not okay. Your feelings of love toward this person may have felt like they were gone when the relationship ended, but you realize that you still love him/her. You expect this person to be lying next you in the morning, but you wake up in an empty bed. You feel incomplete without this person. You think about how much you miss him/her, and that makes everything worse.
The bridge talks about reminiscing. You remember times in your relationship where you thought, “This person isn’t the one I want to spend my life with.” You remember thinking, “I used to be happy, but I’m not anymore. Once this relationship is over, I’ll be happy again.” And you remember thinking, “Once I am out of this relationship, I’ll find someone even better, and I won’t think twice about him/her again.” But now you have thoughts like, “What if this person was someone I could have spent my life with? Now I will never know.” “I’m actually more unhappy now than I was when I was in the relationship. Did this person actually make me happy? Or am I just missing having someone?” You also wonder, “Will I ever be able to stop comparing my new romances to him/her?”
Despite these feelings of unsureness, you keep trying to move on.