So, the story goes like this:
I have a six year girlfriend, she's adorable, hot, loyal, funny, a person that i'd love to spend the rest of my life together. BUT, she's my first girlfriend, we're both 24 years old, and i always wanted to FC other girls (our first time was together). So, as i moved to another city, i decided to open the relationship, just to do my business and not even mind what she could be doing.
Ok. I didn't KC so many girls before. In fact, so far i've kissed only 7 girls, 2 of them after opening the relationship. It was scary at first, cause my girlfriend was still on my mind, but then i decided that i opened the relationship to do that, and then i went to FC the second girl, a HB7,5, 8 maximum.
The first time was strange, but then the other ones were nice. She knew all the time i had a girlfriend (and an open relationship), but she started to say things that were kinda confusing to me like 'i can't like you', in the third time we did it 'why don't you oficialize our relationship?' followed by 'oh no, that was a mistake i said', and, on the same day to her friends 'we're on a relationship, me, him, and his girlfriend'. She wanted me to take her to have some ice cream, but always warned that this would be like a relationship mark. She also had some issues about polyamory and/or polylove, someday she said to me it was ok if 'someone opened a relationship and got another relationship', much due to the fact that she tought what we're doing was wrong cause we should not be seeing eachother so frequently. This whole thing lasted about three weeks and a half (from the first FC. actually after this, i went to see my girlfriend for a week, then i returned and we had sex more five times), and i fucking fell in love with her by the third week. Ye, i know. The thing is, by the end of the fourth week, we were both going to travel: i had to travel to my girlfriends city, to take an exam, and she had to travel abroad. We even had a little travel before, when i gave her a gift and she lost her control a bit, with watering eyes and stuff - much to my surprise. Then she took me to a bench and said 'let's be boyfriend and girlfriend for a while'. OKAY, so you guys got what happened, she was attracted to me, she sent messages and talked to me in a tender way and all the stuff.
THEN, i went to my girlfriend's city and couldnt stop thinking about the other girl - DAMN. She even texted me in my phone even having said that she wouldnt. Okay, we kept contact by text - she coming to talk to me also - until about the end of her first week of travel.
The things with my girlfriend got really strange, i felt myself distancing from her while getting mad about the other girl. I almost broke up with my girlfriend, but didnt have the guts to do so.
So the other girl came back, and by this time we werent talking to eachother for a week, so i sent her some messages (we never talk on the phone, usually messages really) to welcome her - she also has family in a third city, so she was staying there for a time. Then, as most of you guys can imagine, she was DRY. She didnt even sent me kisses (HA, gay, but it was one of the things that made me realize she was different). She changed a lot and stopped coming to talk to me. Then i got really mad, trying to figure out whatahell happened. After insisting to see her, i managed to go to her home: i said everything i was thinking. ye. I asked her why she was different and she said she wasnt (obviously).
Then, she said she didnt want a relationship. She said also she wasnt in love with me, neither now or before her travel (altought she said she enjoyed the time we spent together). Then she said that in both cases, if she was in love with me or not, she would want to stop seeing me so frequently. I told her i was in love

and the night ended in a 'lets still see eachother, but less frequently'. Okay. BUT I STILL COUNDT STOP THINKING ABOUT HER, it was driving me insane. So i started to analyse the situation and got the evidences that she was really liking me before her travel that i wrote up there (there are more, but you guys got the idea). Ok, after this night i decided to keep some distance from her, and she texted me with a link that explained the new relationships in the 21st century - i didnt understand what it meant. Even tough, i called her to have dinner last wednesday, and she agreed. I tried to kiss her at first, but she said we were only friends. Later, in the dinner, she asked me if i had lost the fear to hang out with her in public places (before, we didnt hang out cause i feared my girlfriend discovered something), and i answered yes. We went to have some ice cream, and leaving the place i managed to hug her and kiss her. I drove her to her home and got inside. THEN WE TALKED AGAIN ABOUT WHAT WAS HAPPENING, this time i said everything i could remember to support my thesis that she was in love with me before, much to her denial. Then she confessed me she missed her boyfriend (they broke up like one and a half year ago). I managed to have sex with her for the seventh time, and soon afterwards, she started to cry (LOL). I acted like a friend and got by her side as she was telling me about missing her boyfriend.
Okaaay... so... DAFUQ AM I? Am i a buddy fuck? Dafuq do you guys think happened that she lost attraction on me? (The idea that she fell in love with some stranger isnt really good for some reasons and i think that she didnt want me to break up with my girlfriend to stay with her too, cause i kinda said i would now and she obviously didnt like the idea.)
And, obviously,
what do i do now, considering that i want to reattract her. It's important to say that she says she doesnt want a relationship, cause it could damage her freedom. Also, im thinking to invite her to my home this wednesday - since most of our dates are in her place.

Okay, am i being a real jerk?
Thanks for reading and answers. Any answer will be nice.