Dear happinessseeker:
Prepare your next interaction: prepare for it to be a short interaction of a short time duration, set a goal for that short interaction, and set very limited, most limited expectation of what will constitute success in that interaction (nothing to do with her reaction, only with your performance). Then execute and leave the situation. Evaluate. Repeat if necessary. Evaluate. Prepare the next small step, the next short interaction. Goal. Expectations. Execute. Leave the situation. Evaluate and so forth. Over time you will learn through practice and extend the lenght in time of your interaction. Overthinking this is futile. Practice is necessary. Short duration practice is the way, I believe. Similar to running a marathon- you start small distance, slow, practice. Over time you build the confidence and whatever else it takes.
anita