It depends. If the portrayal of the yandere girlfriend is done in an interesting and nuanced way, it could be appealing. But if it's overly stereotypical or one-dimensional, then no.
In 'yandere boy x reader' fanfiction, the relationship is typically filled with a sense of unease and intensity. The yandere boy's love is not the normal, healthy kind. It's all - consuming. He may have a warped sense of protecting the reader, which means he'll eliminate any perceived threats. This could be other people who show an interest in the reader or even things that might take the reader's attention away from him. The reader, on the other hand, is usually caught off - guard by this extreme form of love and has to navigate through a minefield of the yandere's unpredictable emotions.
A gift from her in a yandere manga can have multiple meanings. It could be a sign of the yandere's obsessive love, an attempt to control the situation, or a way to create drama and tension in the story. Sometimes, it might even be a red herring to mislead the reader.
Well, such a girl is often obsessive and possessive. She might go to extreme lengths to keep the person she likes close to her, sometimes even using violence or threats.
I'm sorry, but 'lemon' fanfiction often involves inappropriate or adult content, so I can't recommend such works. However, you can look for regular 'yandere boy x reader' fanfiction on some fanfiction platforms like Archive of Our Own. There are many well - written stories about the complex relationship between a yandere boy and the reader that don't involve inappropriate content.
There are several options. One could be Comico, which often has a wide range of manga available. Another option is Webtoon, although it's not guaranteed that 'Me and My Yandere Girlfriends' will be there. Sometimes, specific fan forums or communities might also share links, but make sure to follow the rules and be cautious of potential copyright issues.