Quote:
This girl has liked me in the past, but now she has a boyfriend and I'm curious if previous feelings still exist. We're working on a paper together and arranging a meetup.
me: I had another brilliant idea.
Girl: yes?
me: you couuuld come over.

Girl:

when?
me: haha
uhh
actually, pretty much anytime.
my original brilliant idea was to go to our condo which is 5 min away.
8:36 PM but I recently learned that does not have internet. :\
Girl: AHH
LETS GO
me: lol
...maybe.
it's kind of awesome.
Tell me if you can figure out anything from that? She knows that we would be alone, and she's told me her boyfriend is always jealous when we're together.
My thoughts
If you've tried before and she has a boyfriend now - let her go and move on. You're setting yourself up for real hassle and frustration.
There is also a possibility she is simply just liking your attention and needs you around to help with the paper
Assuming you do want to go the masochistic route and try with her, you need to try some boyfriend destroyer techniques.
"me: you couuuld come over.

Girl:

when?
me: haha
uhh
actually, pretty much anytime."
I think that's showing far too much availability.