No you can't get pregnant without having sex.
You need the penis to penetrate the vagina and for the boy to come before you can get pregnant, although the precum can also contains sperm. So if you do decide to start having sex, make sure you use condoms all the time from begining to end. If sex is going to be a reguar thing, then make sure you get on some birth control and still use condoms. Birth control prevents pregnancy if taken correctly, but condoms are the only thing that will prevent pregnancy and STI's