Jesus took bread, and blessed, and broke: and gave to his disciples, and said: Take ye, and eat. This is my body.
And taking the chalice, he gave thanks, and gave to them, saying: Drink ye all of this.
For this is my blood of the new testament, which shall be shed for many unto remission of sins.
"For many", not "for all". That's what Our Lord said to his disciples. To learn what you must do to be among the "many", ask a traditional Catholic priest, who preaches and teaches the Faith of our fathers. If you don't know where to find a good priest, write to us and we will try to help.