I've had a friend over 2day and now i want a hampster?

Do not get yourself a pet without your parents permission. When they find it you will have lost all that money when they make you get rid of it, plus you will get attatched to it and it will be devistating. If they said no it's probably b/c they feel you aren't responsible enough for a pet. Show them you are by doing all your chores and helping around the house without being asked. Get your homework done early, ect.