When a kid in middle school (usually ages 11-14) "likes" another kid and they agree to a week of hugging each other every day. It lasts longer if you're 13+. If you're 12-, it's basically just spotting your "lover" in their group of friends and hugging them, then standing around awkwardly when alone, every day for a week, or a day or two. It's completely fake! Crushes are way better compared to middle school relationships. At least you have something to dream about.
I was once, regretably, involved in a middle school relationship.