I'm sorry you are triggered to feel worried. I understand not wanting to make your T uncomfortable or creeped out, and worrying about putting people off, and getting rejected. From reading your posts here I feel like you are a very nice, considerate, likeable and thoughtful person. I imagine your T probably has her own reasons based on comfort, style, fashion trends, moods, and other things that we cannot think of. For example it's hard to go to the washroom with a long skirt, it touches everything, gathers cooties, and gets dipped into the toilet bowl. Perhaps the skirt makes her skin rub together but pants prevent skin rub. Probably it's not because of you; you were not staring. Still, it brought up these bad feelings inside of you, would you consider sharing them with her? It may help her to get to know you better, and bring you closer in this relationship? Sending you good thoughts.