I know sex with condoms can get dull, especially if the rythm is poor, but that doesn't mean you have to be stupid. Follow safe sex with oral or anal.
I recommend anal, you can cum inside her all you want, and IMO i think its even more intense. Not to mention nature's call would be a breeze for your GF. But then again, you have to know what you are doing, to make her fond of it.
Use toys or tongue bro. If you don't get it the first time, PRACTISE PRACTISE PRACTISE!