She hasn't mentioned her boyfriend, could this mean anything?

I've been flirting with this girl, and even though I know she has a boyfriend through other sources, she hasn't mentioned him at all to me. I added her on Facebook, and she accepted within an hour or two (i dont think that matters, but still), and I noticed that he has her "claimed" on his page, but I had to dig to find him on hers. It also says he lives in another state, but whether thats accurate or not, Ibdont know. I'm pretty certain I've made it clear I'm interested in her, and she hasn't done anything to step back. I've had girls flirt with me just for attention, but it seems different. I wouldn't want her to cheat with me, but I'm genuinely interested in her and wouldn't mind waiting a while to see if anything happens. What do you think?
She hasn't mentioned her boyfriend, could this mean anything?
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