scorpios are very mysterious and guard their feelings closely, so he might not come out directly and tell you. He'll probably do a lot of subtle flirting and make innuendos, but just so coyly that if you were to reject him he won't feel like a fool.
If I were you I would flirt back and be just as coy, but don't come on too strong. Scorps like a challenge, so if you lay it on too thick or make yourself too available he'll lose interest. Mostly cause a) scorps like to be in control and b) he'll think you're needy/clingy and scorps hate that!
Scorps tend not to talk much about themselves or their feelings, so he'll probably do a lot of staring or winking (and such) and make flirtatious gestures until he knows you like him back. So if that's what he does, subtly flirt back, and he's yours! Just remember, he's going to try to keep it cool to protect his feelings. So you might actually have to be bold and make the first move once you've figured out if he likes you.
**Forgot to mention, we hate head games or any manipulative tactics. WE cab read b***t a mile away, so if you want him to like you be yourself and be real. Otherwise you will lose him!
Once a scorp has set their sights on someone, it's all fireworks. Have fun!
I am a scorpio, and dated one for four years!