Girls, What are real signs that girls give that can't be perceived as "friendly"?

[Ousaf1]

Signs of interest in a guy

[Lwdmistyqu]

If you find her by you all the time, somehow always in the same room as you or looks like she’s following you (not creepy but to be in your presence).
Staring at you or making full eye contact (for me at least) shows that I like you, or always trying to catch a glimpse of what you’re doing when you’re busy.
It definitely depends on the type of person though. Some girls that I know are such flirts that they don’t even recognize it but the guys they talk to think she likes them when that’s not the case.