Search Results: talking to an old ex

So, 3 nights ago me and my ex met each other at the corner store. (Some how. We weren't planning it) We started talking and I asked her if she still liked me. She said "yes, but i dont know if I'm ready?". I thought to myself ready for what. So... I just left it there and changed the subject. We got into a conversation about having sex. I didn't care about what she said, i just wanted to have sex. So, I asked her if she wanted to come to my house and she did. We went up to my room and got "ready" (or at least i had too). We then proceeded on having sex. The next morning, we acted like old times. We would cuddle and go make coffee. So... Should I hook up with my ex again or no? please help... P. S. This is my friends story and he didn't want to make an account. He and her are both 16

We had been together for almost 2 years but the last 5 months of our long distance relationship were a struggle because we both got busy and the communication suffered.
I stayed at my ex girlfriends house for 2 days this past week to go to her show. I never got to see her perform and she was phenomenal... Anyways when I first saw her it was an awkward hello like nothing had ever happened. When me and her two friends got to her house we sat down and had dinner but people acknowledged that she was rude to me when my ex wasn't around. Then she had to leave for her show and I got a ride there. Afterwards she had to give me a ride back but the music was loud like she was trying to avoid talking to me alone
Then the next day I got her in a situation to talk to me about our situation. It was a pretty good talk and she removed this barrier that she has up around everyone else. She talked to me like a person instead of being dramatic like she is around everyone else. The talk sort of ended with me asking if she still liked me and she was like "do I still like like you? No sorry that it was harsh"
The next day she came back after her performance and we had a small get together with people before she was home and when she joined in she was rude to me and trying to get everyone elses attention while ignoring me.
I told her the following morning before I left that she was rude to me and we talked and it was really good. after that she opened up and the wall was completely lowered. Some of what came out of that conversation was that I told her that she had changed and she looked sad when I told her but I let her know I still see the same sweet girl deep down. people think that she has become rude and selfish. She mentioned that she wanted new and exciting. That to me meant that she was fighting falling for me (old and familiar). I didn't ask her to, but she said that she would text me every day to tell me how she was doing and what she did.

What does this behavior mean