I assume you have talked about being in the same spot sometimes before, right? I've seen you mention it before. So she knew it might happen at some point, I don't think you're intruding into her personal space or stalking her, even if you do go up to her a tiny bit. But I would totally not feel like doing that either, I get that. If you feel something about the meetings, I'd definitely voice it in your next session. Seeing my T for the first time after half a year was already difficult, I can't imagine how it'd be if it were just a random encounter. I also already struggle with imagining just seeing my T in a normal setting during normal times, so I think it's definitely a common reaction to not quite knowing how to handle it.