First of all, go get other girls. A girl with a boyfriend is definitely not your best target. HOWEVER
I am always down to help, I'm going to analyze a few things you said then give you advice.
She has a boyfriend: This may not be an impossible obstacle but it is an obstacle. When you hang is it clear you're not friends? Has she been honestly considering breaking up with her or is that sarcastic fucking around?
Possible IOIs: I agree those are possible IOIs but I'm a proponent that attraction and will to hook up are very different things. If you are a relatively attractive male, most girls are attracted to you but that does not mean if you walked up to them and asked them to fuck that they would say yes.
I need advice before tmrw: I assume you are hanging out with her tmrw?
So the advice:
In all boyfriend destruction creating an emotional connection is critical. You want to share some stories with this girl, you want to be vulnerable in front of her and you want her to be vulnerable in front of you. On this date you must be sure to get past 'whats your favorite song' and move to stories from you and her that actually matter to you. Then you want to talk about how you feel like you connect well and get her to admit she doesn't connect as well with her bf. Then you want to get with her. That is my boyfriend destroyer pattern. This is a tough thing to do, but is certainly your best shot.
You asked for kino so here's some tricks:
-note any jewelery/armbands/wristbands/tattoos she has and kino them while asking what they are.
-get in situations where you can dap/high five.
-If you want to be really corny tell a bullshit story about how you give great hugs.
-tease her then poke her or something.
But overall, be confident, be empathetic, and stay exciting and you should do fine. Let the vibe of the interaction govern your actions and if it seems like she's digging it go for the hook up. Hey, whats the worst case you get rejected? Who gives a fuck?
stay fiery
check out my blog
fierypickup.blogspot.com