people that say something and dont stick to what they say.....

Well,this is normal human tendency-get used to it.U r going to see much more of this in the future!The more lightly u take it the better it will be for u!

Next time ask them to give you their word. If they break it, don't include them, next time around, because they can't be trusted

Exactly that happened to me this week, thursday. In our classroom, it is kind of cold so we decided to go home for the rest of the day (seeing that no school employee will do something about it). Everyone said that they're going to go but in the afternoon I found out that 5 of them returned.. They stayed at school for every hour that we had left and a teacher, at chemistry, even gave them a good mark for answering a stupid question. The next day, the ones who returned came up with stupid excuses like "I couldn't find the way out" :)). Yeah, right.. :D. Anyway, I hate those kind of people too

Don't worry it's nothing strange in this situation. This happens in all generation. Such people are everywhere. Just don't get them serious. Be yourself and do what you want. If I would be in high-school again I would skip all the classes. You will miss this moments when you'll be on college.

They probably did it on purpose dear, you should be more careful about such people.. this is the price paid for trusting them. I know a lot of people in my class who'd do that. They want to make ou look bad in front of the lecturers to earn brownie points.. so they set you up.