Was she messing with me for a reason???

a couple of weeks ago i was at my best friends, we'll call bob, what you could call birthday party, he invited me and another one of his friends, who we'll call joe, who brought his then girlfriend, we'll call jess and my friend invited his gf as well. so soon after we all got there, and my bob canoodled, i like that word, lol, with his gf, i noticed that jess kept looking at me, now i know that she liked me at one point in time about a year in a half ago but nothing ever happened cuz i was caught up in someone else. so later on she started i guess you could say flurting with me while my best friend and his other friend were doing something else. also she put her number onto my cell and she said just for laughs. so then today she talks to me and so i asked her about her summer and all and then about how long shes been with joe, and she said they kind of broke up, now i dont plan on doing anything as i have a gf that im madly in love with, but im just wondering if somethings going on???