How can I make a girl fall in love with me? (please just serious and mature answers)?

[Max]

I met a girl from Austria 6 months ago at work, but I didn't start talking to her until Dec 31st 2013, that day she added me on Facebook and I said hi to her as soon as I accepted her friend request, we started talking about each other so we could get to know each other more as we don't work in the same shifts. I always found her attractive but I wasn't interested in her at first until we got closer. About four weeks after she added me she invited me to her place to have a couple of beers, I accepted and went to her pad, everything went fine, nothing happened but just a conversation, then weeks went on and I was falling more and more for her, until February 15 I told her that I found her pretty and that I'd love to be her toy boy if she gave the chance, I asked her this cuz at the very beginning she told me she wasnt interested in having a formal relationship as she will leave soon to Austria, I'm from Mexico and here's where I met her, she's leaving soon and makes me really sad. Her answer was that she was going to think about it and she did, the following weekend she invited me to her pad again and that's when our FWB started, she's been my FWB since January 21st, the big problem is that I'm falling in love with her, and I don't know what to do to make her fall for me 2, please if someone's from Austria help me here, She has told me that she wants no feelings involved in our relationship and that she don't want to marry me any ideas how can I make her fall for me?
So there's nothing I can do? I've been told by several people that I have chances, as she also finds me attractive, otherwise she would not have accepted to be my friend with benefits. She obviously does find me attractive as she is not asking for anything in return whenever we have sex.
Thank you Luke and Kawaii,

I guess only time will tell, whatherver happens I thank the lord for giving such a great experience wiht her, worse would be nothing! I guess this is how life is.

I just for fact know that I will be heartbroken pretty soon and the wound will take a considerable amount of time to heal it's been proven that in this kind of relationships always one of the two gets hurt, unfortunately it will be me. Play with fire and you'll get burned!

[Kawaii Icecream]

Sadly, you can't.

But you can improve yourself in a way in which will make you not NEED her.

[Luke D.]

There's no magic to change someone's feeling for you, especially if she already knows you well.

Clearly, she closed herself off emotionally from anyone there, knowing she'd be leaving soon. The idea of love has never occurred to her and it probably won't. She set up those rules long before she met you.

You can always do things that might make you more appealing (pick up a hobby, volunteer, etc.), and maybe she'll see a side of you she overlooked. Or maybe you could be more open about things regarding yourself, if you've been distant up until now. But don't hope for a miracle.