This is called word analysis.
When you are trying to figure out what a particular word means, you are obviously going to analyze it. Maybe you know what its root means, or you can deduce the meaning based on its prefixes and suffixes. You will probably take into consideration the context and neighboring words in the sentence as well in order to analyze it.
I think the answer is d...
Answer: Sad and/or upset
Explanation:
This person seems like it is very sad therefore it gives it the sad and upset tone.
He met a hubshi girl who seemed interested with Santosh. Furthermore, he got English lesson by her and their relationship became closer. This event makes Santosh realizes of his existence after he feels alienated by his surrounding before. Since then, he took so much care of his physical appearance.
