Question: how to know if someone you don't know has a crush on you?
Answer: 1) You Find Signs Of Him / Her Constantly Checking Your Social Media. ... 
2) Their Body Language Screams “I Like You” ... 
3) They Act Differently Around You. ... 
4) They Try Being Next To You As Often As Possible. ... 
5) They Try To Show You That You're The Coolest Person Around. ... 
6) They Will Probably Stare At You As Well.