Questions: Flirting

English is not my first language so my grammar and such might be off.

So I'm the youngest of my siblings and have a niece 21 and nephew 16 from my sister and brother. And I am 22. So one day the three of us went shopping and the store owner is very familiar to my family but first time meeting me. So on that day I kept looking in his direction without letting him notice cause damn he is so handsome. But I was super quiet other than shaking his hand and saying hi and goodbye.

He was helping us out but I kept every now and then turning to his direction and would catch him staring with a slight smile but quickly looking away when he sees me looking.

The second time we went he didn't look as much but was friendly then he asked my niece not me directly just her if I'm her sister she said not I'm actually her aunt and he looked so shocked and confused we laughed and he again said to her im very quiet and on silent mode we laughed and I just said yeah and he looked quickly at me.

Third time walking up to the store his outside helping one of his workers but when he sees us he quickly stops and walks in to wait for us to greet and help us out but little distracted and later on I went with my other niece who was younger into the store he was busy but when walking away he smiles.
Later on when walking past the store I can see him coming to stand in the doorway just staring at us but with such serious but curious eyes.
I'm really attracted to him and don't see him often but when I do I keep looking for signs do these mean anything please don't think I'm a shallow or selfish or self praises myself trying to trick myself thinking he is giving signs. People asking me about our cultures, His Muslim and im Caucasian.