Does he like her ?

"so any moment he wanted to hug her? He replied that :"a lot of times, but please understand that feeling of a senior"...

So the guy wants to hug the girl, but he's holding back from doing so. Why is he holding back?

He is holding back from the "hug" because perhaps he has a reserved personality. Also, his culture may not permit his expression of passion in public.

What is the significance of the use of the word "senior". Does this mean, that in school, he's a Senior ( 4th year high school)? Or...does it mean that he is many years older than the girl?

Conclusion: The boy seems to like the girl and wants to hug her, but he is restraining himself from hugging her, and most likely ( as far as I can tell , this is a consequence of his culture.

He mentions his heart, so one can conclude that the boy's feelings are real and of course that he likes the girl.

Hi you ! thank you for you rep
yes , he is many years older than the girl , hm ...that's 10 years )
and he 's shy guy

He is saying that he feels affection for her, but in a fatherly or brotherly way.

i also don't know , because actors in my country , they very scared of scandal . If they have love scandal , it will be affect their work . It's very difficult to love and open your love in showbiz