To give a perspective from a 41 year old males point of view.  It's more than evident he likes you a lot.  Especially if a guy feels comfortable smiling at you and if he remember things your like.

Every single person on earth is different so he will (of course) have different values and opinions to me.  So this reply is only my opinion.

Issue is the stuff you don't know about him.  I can only go on what you have typed.

Maybe ask him a few questions like, how are your family? He might say I'm not married or that his parents are fine.  Small talk at coffee break or lunch time may lead on to him opening up more.

I don't know how approachable he is, asking question may upset him or he might wonder why your asking him questions.

If he really does like you i don't see why he wouldn't welcome small talk with a few questions.  I know he is your boss, but it does seem he has shown more than normal interest.  Could even small talk to him with a co-worker near you to make you feel more comfortable.

Things could get awkward because he is your boss, but maybe a stand off ish small talk approach may work. 

If you do get talking and he makes you feel uncomfortable, maybe make a excuse to get away from him in some way e.g. need to get a drink or something.

Hope that helped a tiny little bit.  Hope you get the information your looking for from him, without feeling awkward in any way.

Maybe smile at him more and give subtle hints gradual approach. 

From a guys/my personal perspective I tend to miss signals from women.  Maybe look at him more and when he looks at you smile and keep looking for more than a few seconds at him.

Maybe if you can get a co-worker to say to him when your not around that you like him.  And depending on the situation get that co-worker to suggest maybe ask you out for a drink?

You mention the following in your first post:

Then when I was going for coffee with frens my fren called him for coffee and he said only if priya that’s me calls him he will come.

If your really interested in him call him out and he will join you and see how the conversation goes, it may start with small talk and slowly get more subtly flirty.

Good luck!



   

I think he does sound like he likes you. Men can be confusing.