Like everyone already said, there is NOTHING worse than cheating. You will feel like SHIT if you do, especially since you say that you love this girl.. You're probably afraid to tell her that you want something freakier in bed coz she'll think that you're sick or something. Is she really closed minded about these things or are you just scared to even approach the subject? If the ONLY problem in this relationship is sex, talk to her or slowly make it more and more "fun". Every other time do something new and see how she reacts. She might get freaked out, then ask her why she doesn't like it. Some ppl are just not very open to new things no matter what they are. But MAYBE, just MAYBE she thinks the same thing and WANTS you to get dirtier with her. You never know. It's always those quiet ones that are the true freaks Bring it out in her, she'll love it! Let her discover new things that she'd never even thought of. Part of why sex is so much fun is because you get to discover new things all the time about you, your body and your partner..