In some cases, yes. It could be shown as characters revisiting past feelings or finding new love in familiar places. But it's not a common theme across all yuri manga. Different authors have different takes on love and its possibilities.
Well, it depends on the manga. Some portray a very clear line between love and hate, with obvious differences in emotions and actions. But in others, the boundaries can be blurry, making it more complex for the readers to distinguish.
Well, yuri in manga basically means stories centered around female-female romantic connections. It can show different aspects of these relationships, like emotional struggles, sweet moments, and sometimes even physical expressions of love.
I'm not sure. To determine if it's yuri, you'd need to look at the depth and nature of the relationships between the characters. Sometimes it's not straightforward and could be open to debate.