If you ever been in love.

You'll know the feeling. How you feel insane and time passes so slowly when you're not with them. How they dominate your thoughts and you can almost feel them with you. How you can't help but smile when you know they're thinking about you. How when things aren't going well it drives you insane and you can't seem to think straight. How when they're not yours, you miss them so much and you feel that dull emptiness in your chest. Most of all, you'll know how they're literally everything to you and nothing can change that.