There are a couple of things you can do to help introduce your partner to BDSM. First off, make sure you communicate your interests clearly. Let her know what you like and why it turns you on. And if she's reluctant to try them, find out why. Is it just something she's never thought enough about to be interested in? If so, that can change pretty quickly. Or is she more rigidly against it for one reason or another? Knowing the answers to these sorts of questions might help you make BDSM look a bit more appealing to her.

Second, there are a lot of exciting toys to try, but remember that you don't want to intimidate your partner. A whip or a paddle might be a bit much for someone who's new to BDSM and a bit reluctant about it (you can be the judge of that, since you know your gf), so make sure that she's down with bare-handed spanking (it's a great intro to more intense BDSM and a lot of fun in itself). Something similar can be said for restraints. Before you break out the handcuffs, encourage her to grab your wrists and pin you down. That's not to say that you shouldn't get some toys, but just that you should introduce them steadily.

Start small, link with a blind fold, or silky scarf. This stuff can be pretty intimating.