One possible theme could be betrayal. Cheating with your boyfriend's best friend is a major act of betrayal towards your boyfriend. Another theme might be the consequences of impulsive actions. It could also explore themes of guilt and self - discovery as the character involved may have to face the fallout of their actions and learn more about themselves in the process.
The character who cheats might be a bit impulsive and self - centered. They don't fully consider the consequences of their actions on their boyfriend and the best friend. They could be in a state of confusion about their own feelings. The boyfriend could be a hard - working and loving person who doesn't deserve this betrayal. He might be the type who trusts too easily. The best friend might be a bit of a risk - taker. He knows the situation is wrong but still gets involved, perhaps because he has strong feelings for the main character. He may also be a bit of a charmer, which is part of what attracts the main character.
One possible consequence could be the loss of both the boyfriend and the best friend. Once the cheating is discovered, the trust in the relationship with the boyfriend will be completely shattered, and the friendship with the best friend will also be severely damaged. Another consequence might be social isolation as people around them may judge the person who cheats harshly.
One consequence is getting caught and facing punishment. For example, in a school setting, it could lead to detention or a failing grade.
Well, in a 'cheat with my boyfriends best friend novel', the plot could begin with the boyfriend's best friend showing some special attention to the main character. This attention makes her question her feelings for her boyfriend. As the story progresses, there might be secret meetings and stolen glances. But soon, the lies start to pile up, and she has to keep making excuses to both her boyfriend and the best friend. Eventually, it usually leads to a big confrontation where all the secrets are exposed, and relationships are shattered.
I'm not sure if there are many novels that are directly titled this way. However, in some contemporary romance novels, there might be side - plots or sub - themes that touch on this. For example, in some chick - lit novels, there could be a situation where a girl is attracted to her boyfriend's best friend, but it doesn't always lead to cheating. These types of novels often explore the boundaries of relationships and the consequences of having feelings for the wrong person.
Cheating is an unethical behavior, so there may not be many novels that promote this kind of relationship in a positive way. However, some novels might explore the complex emotions and consequences involved in such a situation. For example, in some melodramatic novels, it could be a story of a momentary lapse of judgment and the subsequent guilt and chaos it brings into the characters' lives.
One possible outcome is that it can make things really awkward between you two. You might start avoiding each other because you don't know how to handle the new dynamic. For example, if you've always been just friends and suddenly there's a kiss, it can be very confusing.
One possible theme could be the duality of human nature. Dahmer seemed normal on the outside but was a monster inside. Another theme might be the idea of hidden evil, as those around him didn't suspect his true nature for a long time.
Another theme could be change. As friends grow and change, they might not be as compatible as they once were, and this can be a big part of the 'best friend blues story'. For instance, if one friend starts to get into a different social circle and their values change, it can put a strain on the friendship.
One consequence could be losing the trust of others. If people find out that you and your best friend cheated, they might not trust you in future academic or work situations. For example, if it was in a school project and the teacher found out, other classmates may not want to work with you two again.