[QUOTE= Any suggestions what to do??[/QUOTE]
Ask her about her fantasies. Really take the time to listen.
What gets her off and excited?
What, if anything, about her answers excites you?
How compatable are you?
Curtis had a very valid point -- "I see no indication that the girlfriend in question is submissive in nature. Several people have made suggestions for how to handle it if she's uninterested, but what if she's dominantly inclined?"
Remember: just because you're into bondage doesn't mean she is
or wants to be. It can be a very scary thing, even in play. Trust is critical.
There is plenty of great advice posted in the previous answers,
please re-read them and think about what you both want
out of your relationship. If you don't know what she wants then ask her.
If you do slip in a move like holding her hands over her head or asking
her to pretend being tied, etc, ask her "Is this okay?" "Like this, baby?"
Whatever words you grunt, but for heavens sakes, give her the chance
to say "keep going or stop". You will score big points in the trust department and keep the door open for further "discussion / re-enactments" at a later time.
If she says, "no", she might mean, modify your grip. Not everyone can
speak in sentences in the heat of the moment and the tone of the no
will give you a clue, but not enough. The "how about this?" question should follow a no, or "no what?" It might be a mood killer, but it could be a relationship saver.
Getting off my soapbox, Ruby