Don't be so worried about her being suspicious of you trying something. If she likes you deep down inside as more than a friend, then she will be expecting it, regardless of what she says. She wants to rationalize why she can't, using logic and reasons to shoot down her internal emotional feelings.
If she really is suspicious and acts weird on the other hand, you have to understand
right now, that you will not be able to be friends with her. It will be unhealthy and extremely detrimental to you mentally. Also, you need to really look inside yourself and make sure you're not falling for a girl based on obsession, because she's not yours. I've done this a few times and got the girl, and a month or so later got bored. Guys fall prey to the cat-string theory as well and want it when they can't have it, and when they do, don't really want it. Only you can know this.
With that said, as the other poster mentioned, you need to focus your conversations on relationships now. This is going to be your final game with her, expect to eject from your relationship with her if it doesn't work. Don't be nervous either, if you do go through with it, and she doesn't accept it and you guys fall apart, she may still contact you in time. Women remember EVERYTHING, and play it back over and over in their head like a season of some TV drama, then play back what the other guy did, and then what you did, etc, and constantly try to rate which touched her more, or which she could see watching more episodes of.
You need to now break down her BF in her mind. It sounds very covert and deviant, and possibly so. But remember that a woman is never forced to do something she doesn't want, like I mentioned above, they rationalize against their feelings.
It would be optimal to see her face to face, quiet environment with little interruption.
Use your pre-existing comfort with her to talk about things light, then slowly progress to more serious things (did you hear about so-and-so, my aunt had X happen to her). If you've had other relationships (or, just as good, a female friend is asking you advice about her BF since they're also on shaky ground), talk about them and why they didn't work, but only choose specific things that she can RELATE to the same situation as herself and the guy (like a cold read, be ambiguous at first, she will assume more details than what you say). Don't bring up her relationship, show vulnerability with yourself or your friends. She will bring it up. If not, then do it a second time (2nd meet), and bring it up casually. If she doesn't bring it up, she will leave thinking about how what you said applies to her and be more ready to talk next time. There are many ways to do this, but the most successful, though controversial is below:
[EDIT - I removed from public view due to conscience. Check your PM for the rest. For others reading, try Game and/or being yourself first, then post your situation as well]
Let us know how everything works out for you
CHAT
