How to stop my boyfriends anxiety about me getting pregnant?

Prevent pregnancy: If you use oral contraceptives & take them every day the failure rate is extremely low. All other methods of contraception have a slightly higher failure rate. That is with the exception of abstinence!

Use contraception: Use contraception and practice safe sex. If boyfriend uses condoms, then he can feel more confident about you not getting pregnant. He can be more confident if female contraception is added.