He raises his eyebrows.
Okay, if you want to spot this one, you really need to pay attention because it happens very quickly. Naturally, we raise our eyebrows when we’re surprised about something and if your crush does it, it’s a good sign! If you spot a guy quickly raising his eyebrows when you show up or tell a joke, you are definitely an unforgettable presence for him. Of course, this depends on the situation. If you spill wine on your shirt, it may be because of that.