This has happened more than once? Oy...
I'd try to convince her more forcefully.
I'm a senior psych student

. Try to talk to her
gently in a friendly, neutral situation
and just tell her you're concerned and you
wish she would see someone. Don't even
mention the weirdness- just tell her that
she needs to talk to someone about the
rape. People don't just get over that!
Maybe ask why she doesn't want to see
anyone?
And trust me, you are far too close to her
to help her at all. Even when you are a
professional, it will be the same way.
