Built up in 3 months, torn down in 3 days

That is, confidence.. I never thought about it, but the last 3 months helped me build my confidence, but then just the starting 3 days of school, its gone.  Friends ain't friends no more, somehow we don't talk, and stuff, but I guess its my fault. I felt so lonely, that only on the 2 day, evening I couldn't take it, I quickly went to shut myself to sleep. I couldn't bear all the feelings, I thought that this year would have a good start in school, but I guess nothing goes as you wish too.