<human>: Can you provide a brief rundown of the text in within 3 sentences?

We were together for 9 months (me = M18, her F17), broke up in November 2013 cause things got weird, we both got busy and it just got messy. No arguing or anything. Did the whole no contact thing mostly, felt depressed in the beginning, but I started living and enjoying life, flirting with other girls, etc. I was happy without her.  We talked occasionally throughout the months.

Then a month ago we started casually talking again (no awkwardness) but i still continued doing my thing. Then 3 weeks ago im working/studying alone and she comes up to me and sits down and talks to me. She looks at my bicep a few times in conversation, and then touches it. 

She really seemed like she missed me. Then last week she said she was nostalgic and missed what we had, she seemed sad. I told her I did too, and we agreed to hang out again. There were some light flirtations and things were cool again. 

Last night, she came over to mine, we chilled and talked and did random stuff. It was casual and there was no awkwardness. I wasn't really feeling any sexual vibes, but for a time she seemed like she wanted to be closer to me, and she did flirt a bit. 

Eventually, we're sitting next to eachother on the bed for ages talking, I decide to make a move, but she doesnt turn her face and gets stiff. It gets a bit awkward, then she says "I'm kinda confused....and you're leaving soon (for uni)....i like hanging like this/as friends". 

WHY, WHY, WHY. I don't have any feelings for her really, maybe some, but it's just like why do this to me. She was so into me before. 

Anyone else have similar stories of getting back together with an ex, but they then change their mind?

She was living her life too, she doesn't need me, so why use me for comfort? She doesn't have a devious plan or anything, she did have feelings for me for the past 2 weeks for sure, and said she was thinking about me alot
<bot>: Ex wanted to get back together, tried hooking up, got rejected by her. She gave off the idea that she really wanted to get back together again.