Friends or no friends,thats the question

Yes in some days my class go on a trip. We'd to build groups and I were with some of my friends.I were really happy.And today they said to me,that they needn't me anymore.yes it was lie like a hit in my face. I was really sad.:(
And then I said them, i would maybe go to america in 2years for one year. And they weren't interested. Yes i told I would say go and say just said 'okay' so now is the question:
Are they really friends?

Do you have friends like this??:( its very sad,that persons can do something like this..