Choose what you really want

Self-respect is the foundation of sexual health and of healthy sexual relationships. All people are sexual and it is normal and healthy for women to have sexual desires. It is also normal and healthy to not want to do some things even if the world around you suggests that 'everybody' is doing it. Respect your body's desires and your own ability to make good decisions.
Sexual choices have consequences. Some of the most difficult choices you ever make will be about sex. Your choices may shape your:
social relationships
relationship with your family
future lifestyle
experience of emotions like love and trust

There is a lot riding on your decisions, so you have to make sure that you chose what you really want. If you're not sure about a relationship or if you don't want to do something sexually - wait. Human sexuality has many physical, emotional and mental elements. Ideally all three are leading you to the same decisions, but in the real world, things may not be that neat. Give yourself time to work through conflicting desires; this is an important part of self-respect. Don't let other people make your decisions, if they respect you, they'll wait too.
Because it can be difficult to make decisions in the 'heat of the moment,' think about what you want in advance.