<human>: Can you succinctly summarize the text in 1-3 sentences?

Hey, I've been friends with this girl for a few years and I've recently started seeing her in a different light.  The only problem is all my past relationships I've been the one asked out or started via online dating and I'm not sure how to specify intent.    

I'm not sure if the feeling is mutual, but we have **literally** slept together a few times during drunken fun times.  

I'd like to ask her out to the movies sometime soon.  I plan to do it via phone call as we always hang out with a bunch of other people and I'm not sure if Facebook/texting is appropriate for this.    

The main issue is that I want it to be just the two of us and we usually invite a bunch of other people to things like that.  Is it weird if I just say "is it cool if its just the two of us?" if she tries to invite anyone else?  

 
Throwaway account because she knows my reddit name.
<bot>: Want to ask out a friend, over complicating and freaking out over it,  want to get my intent across without it being weird