If he looks at you a lot, spends time with you, makes you feel important, then you don't have to doubt.

Sometimes, it's hard to tell if he is into you. Every man is different, maybe he is more of a shy type who doesn't show much affection or not used to expressing warm feelings in any way. Then you will need to learn his charachter first. If he is so distant toward everyone or just you.

More signs if he is into you

Initial obvious sign if he likes you is eye contact. I'm sure you experienced different eye contacts in your life, so if his is just a little longer, you can be sure that you caught his attention and he finds you interesting.

If he makes extra effort to talk to you, gives you more time and attention, it's obvious he enjoys to spend time with you.

Sometimes a man will like you but won't do anything about it, which can leave you confused and frustrated. Maybe he likes you, but he is not ready to enter relationship right now.

Maybe he has a girlfriend, or some other reasons. So, yes, he could like you very much but not show any signs of pursuing you. If doesn't see a future with you, he might even try to avoid you.

The obvious sign if he is into you is if he asks you out. If you have to wonder whether he is into you or not, he probably didn't ask you out yet, and he might have his own reasons not to. He could still like you very much but not doing anything about it.