Hello PUA'ers!
A few months ago I wrote in here asking about how to get my Ex back after we almost just had broken up.
Today, 4,5 months after we broke up, we've kept in touch - as friends. Which was, for the most part, OK. I could not see a way to re-ignite her heart once again, and she was not interested in any form of romantic relationship with anyone for at least a year due to her living with her dad until she finds her own place - but first after she finishes up her half year internship as a radiologist in a whole different city (2-3 hours away).
Her reason for breaking up, as far as she has told our friends in common, is because it simply went
too fast. But she told me repeatedly that there might be a chance of us getting back together, when has moved out to her own place. She wouldnt deny interest in this - without me asking her. I went completely One-itis because of this and this sparked alot of conflict between me and her, because I was trying too hard to almost pressure her. I realized that it was stupid, and I calmly told her that I would calm down and be natural. She loved this and immediately became very happy with me.
I respected this, and we've stayed somewhat good friends up until 2,5 weeks ago where we perhaps had a slight misunderstanding.
Before this we usually texted casually, snapchatted, and she even asked me, several times, to go to the fitness center with her, so that we could work out together - me and her. Additionally she asked me to invite her to my housewarming party, as i just moved out - (I lived at my parents house, while we were dating). All of this while I was improving my own life and still seeking out other girls - mainly to keep my one-itis at bay, and perhaps find another SO.
All of this isn't really anything overly special. Its a slight indiciator that she has an interest in keeping our bond alive.
THE ISSUE
2,5 weeks ago, she did not ask me, to go training with her. Instead one of our common friends asked me and I said yes. Worried about her sudden lack of contact, I wrote to her asking if she was coming. She said yes - but in an almost cold-like manner.
I went and we joined some instructor who was training crossfitness for beginners. My friend was placed in-between me and her, so we did not have alot of contact. Suddenly our instructor asked that we find ourselves a partner.
Seeing I had the one-itis problem I fought myself not to ask her, seeing as she actually didnt even bother to contact me about fitness that day. So I just asked the hot girl in front of me to be my partner, and she smiled and said yes. My friend was looking at me, as he had no choice but to ask my ex, which he did.
I was fine with this, and after we were done, my ex told us that she wouldnt be leaving with us, as she had to pick up her girlfriend so that she could visit her.
After I got home, she finally left the fitness center and immediately snapchatted me -
while driving.
As if she just couldnt wait to contact me. She wrote: "Oh, it was so hard today. Im going to be soar tomorrow

"
I replied: " Yeah it was okay!".
Immediately after i sent this snap-message, I remembered that she bought some massage oil, back in the
VERY early days of our dating, so that i could massage her.
I joking took at picture of the massage oil, and wrote; "Maybe we can fix that soreness up with this

"
Her reply was "No, you can just save that massage oil for someone else

".
WOW, I was thinking. I replied again jokingly "No, this is only for you

" and straight after wanted to change topics so I sent another message immediately "Do you think you can go to work tomorrow while being sore?

"
I received no response. And to this day, all that ive heard from her, is a personal and friendly birthday-gratiulations message on my facebook wall. 2,5 weeks of no contact. This has never happened before.
Guys and ladies - I am deeply confused here. How can she get so frigthened by that one snapchat message?
And what could I possibly do next?
Keep in mind, that I still have some interest in keeping her as a friend, but I still like the idea of us finding back together again romantically.