Butterfly like feeling in the body?

So hello everyone out there in the Fluther network! It’s been awhile! Here’s the synopsis: When I tell my girl friend to not “Worry about it.” when something happens (like she does something clumsy, or something small doesn’t work out), she gets butterflies and sometimes goosebumps in her body. She claims that they’re not in her stomach sometimes…But what could this mean? Is it a sense of security that she has with me when I tell her “Don’t worry about it.”? My tone is very calm and casual and it’s reassuring to inform her that it’s not a big deal, and that I’ll handle the small situation. This also applies to other situations that are a bit bigger. So…Any ideas? What does it mean for her, and what does it mean for me? It’s great to be back! I’m still a walking question mark!