Thanks for your reply again.
The only issue is, is that I only see her at her work and there is always a bar in between us
I told her I don't think it's a good idea to go out as long as she has a BF...so not sure what it will look like if I do invite her to a party next time...
Just for the record I invited her to go to a club with me and my friends before but she couldn't make it that day. She promised me that she will be there next time. Then she invited me last Friday and I told her it's better if I don't go, since I don't want to bring her in the temptation to do something 'bad'.