He makes eye contact and talks to you. If he is "really" into you, he finds excuses to see you like "I can't find the ice cream in the freezer, could you show me?" Don't be surprised if you get a kiss for your trouble.
if you really like this guy, then get to know him..you should like guys for their personality's as well as looks...so once you get to know him then you can decide if you really like him. Who know's you might actually really hate him.
When a guy can be his complete self around you and people tell you how much he really cares, then you will know when a guy is really into you. if he feels he needs space, let him have it. ITS IMPORTANT! Good Luck<3
get to know him more
Just ask
He flirts with you
get 2 know the guy more.
There really important to you okay and that means that there really special to you okay
The way he looks at you will make you know if he really is crunching on you.
Once you start dating, and the guy seems really interested and nice and funny to you, then you'll know ;)
Why do you need to know? If you really have to know, the only way is to ask them.
Ask him.
You ask.