He will beat you over the head with a club and drag you back to his cave.
He stares at you all the time, smiles when he's done talking to you or durring, and he acts weird around your family and friends- so weird that your family and friends notice first. Also when there are other people in the room and the one he talks to the most is you and he tries to make tou laugh a lot.
That lump in his pocket is not a squirl
He keeps looking your way n smiling
he will send you love letter and confess his feeling
Men are pretty demonstrative and outspoken when it comes to girls. So sit tight and wait.
He will marry you within 6 months.
If he teases you, pays particular attention to you or smiles at you often there's a pretty good chance he likes you
Let me know when you find out. It's nice when they just come out and say so.