Answer:

1. There will be some biological changes in you also like loss of appetite, lack of concentration, etc. You will literally daydream about him. If you are having a crush on your friend, then you will feel jealous if someone else is trying to flirt with him. This is the most common feelings that we all tend to experience.

2. Many factors influence whom people are attracted to. They include physical attractiveness, proximity, similarity, and reciprocity: In the early stages of dating, people are more attracted to partners whom they consider to be physically attractive. Men are more likely to value physical attractiveness than are women.