I had a one year (plus a few months) relationship with my "too young for me" gf. Then, several weeks ago, she ended the relationship. It ended amicably. She works in the same company but in a different building. In hindsight, during the last 4-5 months of our relationship, there was a steady decline in contact between us. Now, that things are over, however, she is around me and my office as often as she had been at the start of our relationship over a year ago. Note, we do not see each other socially in any way and we don't talk socially or casually or anything like that.
So, my question: is she keeping an eye on me, even though I'm showing no signs of renewed interest? If so, why is she doing this? The more I remain stone-faced, the more she seems to be around. Also, as a woman, can she "sense" that I've already started dating other women?