What's changed here? Is she BACK in town???
Regardless, unless "hanging out" is a euphemism for her wanting you to eventually start "hitting it" again---be very careful and mindful of the amount of time you spend with her.
If nothing particularly bad happened in the relationship (other than she obviously had more interest in the out-of-town job than she had in staying with you at that time), then it could be an interesting experiment to spend SOME time with her just to see where her head is at.
Whatever you do: DON'T come across as you're so happy to see her that you're willing to drop everything just because she's resurfaced. Communicate in subtle and if need be, in NOT so subtle ways that your life has gone on just fine since she left.
Make SURE you leave her with the impression that there is a SQUAD of hot women competing for your time. Give her the impression that there's a line forming of women who want to be with you---and that she's at the BACK of it. Not in a snarky, conceited, or fake-assed "alpha" sort of a way---but just in a way that shows her that you're really just a busy guy with a lot of other interests and options.
That way, you have more of a chance of her showing MORE respect for you than she would if she thought she could just "show back up" and pick you up EXACTLY where she left you.
Usually, the hotter the woman---the more she'll appreciate THINKING that the man wants is at least a little hard for the average woman to get. Thus motivating her to ALSO have to demonstrate an above-average consistent, show of interest to lock you down into a relationship with her.
Soldier on.
V.U.