I think 'Your Lie in April' could be similar. It has elements of complex emotions and explores the depth of human relationships like Love or Hate.
I'd suggest 'Ao Haru Ride'. It has similar emotional depth and character development as Love or Hate. The storylines focus on the internal struggles and relationships of the characters, and the visual style is comparable in terms of capturing the mood and atmosphere.
Well, 'The Vampire Diaries' manga could be comparable. It shares the theme of vampire love and drama that Twilight is known for. Also, the character dynamics and emotional conflicts have some similarities.
One manga that comes to mind is 'Neon Genesis Evangelion: The Shinji Ikari Raising Project'. It shares some similarities in themes and style with the original Evangelion.
One manga that could be similar is 'K-On!' It has a similar lighthearted and fun atmosphere with cute characters and school life themes.
You could check out 'Gunslinger Girl'. It shares some elements of intense action and complex characters like in Kill Bill. The storylines have a certain edge to them.
Not many mangas are exactly like Killing Stalking. But some that might have similar dark and intense themes could be 'Tokyo Ghoul' or 'Parasyte'.
I think 'Barakamon' is somewhat similar. It also has a laid-back and heartwarming tone like Silver Spoon.
You might like 'Nanatsu no Taizai'. It has a similar adventurous and magical tone as Fairy Tail. The characters have strong bonds and face powerful enemies, and the story has a good mix of drama and lighthearted moments.
One that comes to mind is 'Vinland Saga'. It shares similar dark and gritty themes along with complex characters.
You might like 'Kimi ni Todoke'. It shares the theme of building relationships and has a comparable light-hearted yet touching tone like Love Junkies.
I think 'Spirit Away' could be similar. It has elements of supernatural love and a unique art style.