If she isn’t responding/engaging in conversation
She’s most likely not interested, and if she is, is it really worth it? If a girl wants to talk to you, she WILL. Nobody waits days to answer someone they’re genuinely interested in.
If she’s obsessed with you
This might seem great at first, but can turn south quick. Codependency is not healthy, and can create a foundation for control, manipulation, and abuse later on. It’s better to have a life outside of your relationship, rather than let your life revolve around it.