How do you decide if a girl is just being friendly or there's

If she lets you put your penis into her ass, there's a slight possibility she is after something more. Just wait, talk to her after the sex is over and think through the signals she sent.

You ask. How is this hard?

>>18662763
What about her vagina, what if I find my dick in there?

Not OP

>>18662759
Express how much you enjoy her company, and ask her if she's interested in taking it further or if she'd prefer staying friends. If her face contorts into anything other than excitement, you now get to play the awkward game of deescalating that shit. Wave it off, let her know you were just getting a sense of direction (don't literally say that word for word you fucking autistic faggot) and give her space, but remain open and drop her a message once in a while. If she reads and doesn't reply, don't send another. She'll either come to it when she gets time or you're done, and disappearing back into "nah we don't really know each other, hung out a few times" territory is the best thing for both of you.