“Just In Love” is the second single from Joe Jonas' debut studio album, Fastlife, in which he tells his lover that she doesn’t accept the truth in their arguments, but while still being in love with her as the person they truly are, he’s scared of losing her as a result of their current state.

Joe commented his opinions on behalf of this song, where he states:

‘Just in Love’ is a song that I wrote about a relationship that I was going through and the frustration that sometimes you get when somebody’s trying to argue with you in a relationship and those mixed emotions were, they’re trying to confuse you and all you can do is say, “Listen, like I love you. There’s no reason, there’s no reason to argue—I’m just in love with you.” And it was something that I was personally going through and now I’m happy to share it with the world.