About a month and a half later I get some feedback on this post.
I've been enjoying some great holidays since the beginning of the month, barely being in my hometown because i've been traveling a lot (Croatia, Barcelona, Lisbon).
I've had a great time with the women as well

A lot of good material has been tried out and been a success.
I've been back in Belgium for 3 days, and there aren't much people around, so it gets kind of lonely and this is the kind of time you'd like a girlfriend to help kill it.
Two nights ago I met up with some friends at a bar, turns out my ex-girlfriend was there as well (she share a couple of mutual friends). Once again she was acting like she couldn't stand me, so I wanted to go talk to her but we had to leave, so I texted her something like this:
"I'm not sure whats your problem with me but we need to talk about it because I don't like having awkward situations like tonight each time we go out with our mutual friends"
the next morning she answered:"There's nothing to talk about. You did things that make me unable to stand you anymore. How you we're last night pissed me off. Always wanting to be the center of attention by bragging like the worst. I have nothing else to say."
I answered:"I'm not sure what kind of things I could have done to trigger that. Had I cheated on you or bad-mouthed you when we were over I would have understood. But I don't understand why your holding a grudge against me. As for the "bragging", your the first to know that its full of sarcasm and i'm not really like that.
I just feel like i'd rather it be cool when we bump into each other than the opposite. Now if you feel different about it I can't do anything but just thinks its a shame."
She told a bunch of friends how "she couldn't stand me" or "saw the ridiculous pictures of me and some of our friends in Barcelona and how I was "showing off"". When in fact we we're just all having fun with fake tattoo's we "blind-tatted" ourselves with.. My bestfriend ended up with a unicorn on his cheek, and me a diamond on my arm.. Fun, drunk times with the guys!
She basically can't stand me anymore, and I don't understand why. And to be honest, i've worked on trying to not give a fuck, and i've done an O.K. job, but I keep this idea in the back of my head as of "what the fuck is her problem?", its not like we ended our relationship awfully..
Furthermore, she has a boyfriend, acting all in love and doing shit she always said she hated when other couples did it (showing affection on facebook and shit, things she didn't even do with her 2-year ex boyfriend).
Its just pissing me off, not knowing what the fuck is her deal.