Is my coworker flirting with me?

heres the deal, my coworker kinda acts like a ***** like 3 rd grade flirting. she tends to linger around and walks by to stand in front of me and stare. we always are making eye contact and after work she will wait for me to get off and walk to our cars together. she's been talking to me alot more and we seem to be hitting it off. i just dont know how i should peruse her or if shes even interested.