At some point she became uncomfortable with what was going on. Maybe at the start...maybe a bit later. The catalogue would certainly make many people very uncomfortable. And she has let you know that she is not comfortable. That is something someone else may have even suggested to her to do (such as the HR department/representative). It may be to put you on "notice" and if you really really watch what you are doing you may dodge the bullet. But it may be just a "Step 1" is laying an official complaint.
I would say you should avoid her at all costs...and somehow make it clear that you are very very sorry - but in some way that does not seem creepy or like a stalker or anything negative. And be very very sorry. It seems like you don't know why/when she began to be uncomfortable...but that is not necessary to know...what is real here, and what is all that matters is that you made her feel uncomfortable in some way related to "sexual harrassment". You admit yourself that you were starting to get feelings for her...and obviously she does not share those - at least does not any more if she ever did. So whether something changed, or you mis-read it from the start....none of that matters. What matters is she has let you know that she is not comfortable with it...and if you are very very very lucky you may keep your job.
I would say you should avoid her at all costs...and somehow make it clear that you are very very sorry - but in some way that does not seem creepy or like a stalker or anything negative. And be very very sorry. It seems like you don't know why/when she began to be uncomfortable...but that is not necessary to know...what is real here, and what is all that matters is that you made her feel uncomfortable in some way related to "sexual harrassment". You admit yourself that you were starting to get feelings for her...and obviously she does not share those - at least does not any more if she ever did. So whether something changed, or you mis-read it from the start....none of that matters. What matters is she has let you know that she is not comfortable with it...and if you are very very very lucky you may keep your job.

