First, approach your friend in a non - threatening way. Listen to his concerns and don't get defensive. Maybe plan a special outing with him to have a deep conversation about it. Share your future plans and how you hope to still be a good friend to him. Also, encourage his mom to talk to him as well, so he can hear from both sides how serious and committed you are to this relationship.
First of all, this is an inappropriate and non - consensual situation. You should firmly say no to him. It's important to set boundaries in any relationship. If he continues to pressure you after you've made your stance clear, you may need to re - evaluate the friendship. No one should be forced into any unwanted sexual behavior.
I'm not sure specifically which 'friend request novel' you are referring to. There could be many novels with this title or related to this concept. It might be about the story that unfolds around a friend request, perhaps exploring themes like new relationships, the mystery behind the person sending the request, or the impact it has on the characters' lives.
First, you should communicate openly. Let your friend know that you are there for them and that you accept their choice. For example, say things like 'I support you no matter what you wear.' Second, avoid making fun or being judgmental. Everyone has the right to express themselves. Third, if possible, join in some positive cross - dressing related activities together, like going to a fashion show that features diverse styles.
In a 'friend request novel', there could be a young, curious character as the main character. This person might be lonely or looking for new experiences. The one who sent the friend request could be an enigma, perhaps with a hidden agenda. And then there could be a best friend character who gives advice to the main character about whether to accept the request or not. Their interactions and the different personalities would drive the plot forward.