That's very sad. I'm really sorry that has happened to you. She sounds like she wasn't serious from the start, because of that end talk, then going for the other guy. It sucks, but things like this unfortunately happen. What you should do though is learn from it. People can appear to be a certain way but are in fact a whole other person skin deep. She should have just told you from the get go if she was experiencing puppy love or confused feelings or whatever. If she was confused, it still doesn't change the fact that you are the one hurt at the end...
I really am sorry this happened to you. *huggles tight* If I may say something though...
Being in love for a month and a half will usually always end bad. Now you may have known her much longer, and just recently fell in love. That would be different, however if it was just a recent thing, like boom love, then I don't really feel that the end result is that surprising. I feel that people who use the L word early like that simply can't justify how they feel at the time, due to the relationship being so great or everything they wanted etc, and in the end it's a temporary rush. When that's over, 2 things usually happen. They realize the feelings are true, and everything's okay. They realize they didn't feel that way, and they break things off. I don't want to be the bearer of bad news, but it sounds like she had puppy love. Puppy love almost always ends bad.
If you've known her longer though, and merely didn't specify, then either:
A. She was confused on how she felt, then figured it out.
B. Just got with the other guy because she thinks hes better or whatever.
Either way, it's very unfair to you, especially if you feel this strongly for her. Please eat though, and continue on with your life. No one is worth this, especially not someone who just ditches you like that for the other person. If she meant what she said by any means she would have given you a chance. Since she didn't, she isn't worth the troubles you are going through now! You will find someone better, someone who means it when they say it!
*hugs again* ♥
If you want to talk about this more, go ahead and send me a PM. I'd love to help more if I can!