Not necessarily
If a guy teases you it's because he is the spawn of the devil and wants to be mean to you. You will then probably think he likes you so he will have sex with you and then crap on your chest after wards and leave you
He is jealous.
it means that they may be into you.
In guy talk, that usually translates to "I have the emotional intelligence of a teaspoon and think being mean equals flirting." It's like a toddler pulling your hair in the sandbox and expecting you to swoon. Tell him to grow up or find someone who can express their feelings without acting like a middle school bully.
He want to flick your bean or if your a guy he wants to toung punch your fartbox!
he's just probably jelous that he didnt get you before the other guy did. that or he doesnt have anything better to do.
He wants you to tease him (if u r a girl)
It means the guy's friend has a thing for you, he likes you but knows he can't have you, so he teases his friend about you.
If someone teases you it may mean that he fancies you. If a guy teases you it usually means he wants to get your attention or see how you react. When he teases you, just smile at him. However, it doesn't always mean he likes you. It may be the opposite. I suppose it depends on whether the teasing is mean or not...
Usually means they are interested in you
if you like the guy, lead him on and hopefully he will like you.