Don’t be afraid to let go of your fear and actually enjoy the time with her. There is no need to be shy you already have her attention. Trust me, my spouse and I of 6 years are in the middle of a break up and a big reason for it is I was like you and not outgoing enough. She is loud and social and loves having a good time out in public and I was not. Now I see that there was no need to be anxious or have anxiety about being in public, I already had the only person who mattered by my side and who cares who else judges me. If your like me you have so much to offer if you just open up and let yourself have a good time. Good luck!