You are perfectly safe. Its impossible. Also I'd like to add. Since you have a boyfriend, it is up to you too weather or not you are going to have intercourse please be sure you are ready, it is a big step. If you do decide to make sure you take all the precautions necessary to be safe. 2 types of birth control is recommended as one can fail. Best wishes.
Agreed, nothing to worry about. You should also look into if you are old enough to have a boyfriend.
You have nothing to worry about. The semen containing sperm have to enter your vagina and access the cervics in order for you to get pregnant. I am going to recommend that you do some research into what causes pregnancy so you do panic over things like this.