What's going on with this girl?

We dated a few months back, and it ended on a good note. We kept in touch through texts. For the past few weeks we have been in constant contact via texts and phone calls. We have even hung out a few time and had . When asked what kind of title she would but on our relationship, she answers with FWB. I'm cool with that, but it seems to me like she has feelings for me other than that of a FWB relationship. Just the other day she came to my house for a party, and got jealous of a girl talking to me. But then tells me she was just messing with me. I honestly thinks she wants a serious relationship again, and I'm not against it. So what do yall think?