Everyone else in my class was invited except me,and I don't

Everyone else in my class was invited except me,and I don't know why.except 意为 （__除了___）,表示的是一种（否定____）,前面的名词或代词表示全部,如（_all_____）,（___everyone__）,（_everybody____）等.besides意为（_包括,除了______）,表示的是一种（__肯定____）,前面的名词或代词为部分,常与（_someone else_____）,（___some others___）,（__another classmate____）,（__具体人名如Kate___）等词连用.
Everyone else in my class was invited except me.意思是除了我,大家都受到了邀请.
Besides me,someone else in my class was invited .意思是除了我,还有另外一位同学也受到了邀请.（包括我）