You might choose to be celibate until you feel different. If you are dating do you not feel secure enough to trust that your partner will support you if you 2 had sexual intercourse, and then u became pregnant.
Also just because you physically stop your periods doesn't keep you safe from sexually transmitted diseases unless your partner uses a condom, and you should use a spermicide, just in case.
Then if u take the birth control pill you will be about 100% safe from pregnancy..
AIDS is scarier than pregnancy so just protect yourself w/ a physical barrier like the female condom or buy condoms for the guy if he doesn't have the money but you want to have sex w/ him.
Really, take your time, don't have sex just because your friends all are having sex. It is ok to say no, you are not ready yet and feel good about yourself. Good luck.