How do you see my situation?

ive known this girl a long time and we had a cl together back in high school. i know she liked me bc when i graduated that year she left a message in my yearbook saying i had left a giant imprint on her life. recently weve been friends on facebook and she always seemed to post a status either contrary to mine or along the same wavelength. anyways, we talked a couple of times on facebook chat and had led me to believe she liked me but other times she would say very little. usually when i wasnt on top of my game or didnt feel the need to please her. ive commented on some of her photos and she seemed happy about it bc she would respond very enthusiastically. i asked her out on facebook bc she listed herself as single, although ive known shes been single for some time. she was married for a while and just recently( a month ago) filed for divorce. although i think she would have gotten it over with sooner had she felt like doing so. seems a bit confusing to me. so my question is leave her be and move on, or do u think she is just thinking it over. mind you we havent ever hung out just the two of us ever. although a while back she gave me her number and texted me a painting she had made. do u think shes just thinking it over? im very prepared to move on. im just a little confused about how she seems to me to be interested and yet she can be so distant at a moments notice. any insight or understanding would be a great help. thanks for reading.