Far from the eyes, far from heart

[Meneldil]

I was going to write a very long post, but I'll keep it short.

While I was studying in Canada, I've dated a girl from there. Unexpectedly, things got a bit serious, we lived together for almost one month, went on a trip for two weeks, etc. I had a really good time with her, and was trully sad to leave her at the airport.

Thing is, since I'm back in France, I'm not really bothering anymore, while she's more in the 'totally in love' spirit. She gets mad if we don't chat daily, if I don't write to her weekly. She keeps praising me and telling me how awesome I am (which I find deeply annoying).
She's also arguably not as well-educated as the people I hang out with most of the time, and coming back to France, I realized just how much I've been missing arguing and getting mad about politics and stuff. Honestly, there's no way I could argue and discuss these things with her, because she barely knows anything outside of Canada (though I blame Canada's terribad education system rather than herself for this). Furthermore, she's seeing all her friends getting married, and wants me to move to the UK with her. There's now way 1 - I'm going to live in the UK 2 - I'm going to live with some girl and get into something serious while I'm only 23.

So, while I receive letters in which she tells me that she keeps thinking about me, I feel like lying everytime I write 'I miss you'.
Now, she's coming to visit me in two weeks. In any case, my plan is to break up at some point. Thing is, I cannot break up before she visits (she already booked the tickets), or while she's visiting ('Hey, I'm glad you finally paid 1200$CAN on this tickets to visit me. Oh, we should break up btw').
I'm pretty sure I'll enjoy seeing her, and spend some good time, but this long distance relationship will start to bother me again as soon as she will have left.

My (girl)friends advised me to break up as soon as possible, as the longer I'll wait, the more sad she'll be when I'll tell her to find someone else. But I know she's going through a difficult period, and I think that breaking up would only make it harder for her. So my plan is to slowly get her to realize that our relationship can't work, that I don't want to get into something serious at the moment, that I'm actually an ass, etc. etc.

Any advice?

Being an adult and acting in a responsible way is slowly starting to piss me off

Edit: Damn, and here I was trying to write a short post.