Can you get pregnant at 13 without the guy that got you pregnant going to jail?

That depends on the age of the male-

If he is over 18 then Yes- that is a criminal offense and he will most probably be sentenced and perhaps go to jail.

If you were both 13 (or he is under the age of consent of that state) then he is a minor, and will be charged as a minor (with a chance that he won't go to jail).

So depending on the state the severity of the crime, the punishment will be different. Also you will be partly to blame so you will have the child social services visiting you and your parents.