10 POINTS!! I need a MATURE answer!!!!?

[foprtjk]

Im 20. I met a girl about a month ago. We hung out every day for 5 or 6 hours a day and have been eating dinner in our college commons area every day. She comes over until very late at night and texted me literally all day non-stop. She told my friend when we first started hanging out that she was still "sort of" seeing someone else that she went to high school with that was studying abroad for the semester. This other kid came back right before summer and ever since she has texted less but we have still hung out a few times since then. I told her I liked her and she said she liked me too and "didnt know what to do" but wanted to see me in the summer. we live 45 min form each other in the summer. Weve been home for the summer for two weeks. Shell go 3 days of ignoring me then text me nonstop for a few days. The length of the time ignoring me has gradually increased. Shes listed 'in a relationship' on facebook and her pic is the two of them. What do I do?