I like my lecturer and it's bothering me

Hey guys so recently I entered college and I'm lovin all my clasess. When I met my lecturer on my first day I couldn't help notice how cute she was, yes she was witty smart and sarcastic but she was laid back and seemed cool. I didn't know what it was but I just started noticing small things about her both in personality and appearance each day. But not I'm anxious at the though of seeing her because I'm not sure how to act normally round her again. I mean of course i can treat her a decent human being and abide to the rules it's just I'm scared she will get a vibe off things like eye contact or body language or pick up in change of behavior in class overall e.g lack of participation for example or being distant and not present in the lesson emotionally. She's older that me by six years so it's not a ridiculously large age gap. Idk how do I cope I never been in this situation before. Ssry for the rant 🖤😅