I want to get a puppy
Have you been planning on getting a puppy for a long time?
I would really like a puppy and to have someone to take care of.
I can understand why you would want a puppy. Everybody wants someone to care about them. Make sure you want the puppy for the right reasons and can take care of it like you should.
My parents wont let me get a puppy.
I guess your parents think you aren't ready yet. Judging by your statement, I would agree with your parents.