Wolfsong:
Absolutely re: safety. There's no way to emphasize that enough, and if people are adamant about it enough so that it sinks in, maybe we'll stop having fifth and sixth graders having sex.
So, to reiterate...
Don't go bareback unless you're in a monogamous relationship...and even then, glove up unless you're actively planning on having a child.
Never do anything with anyone you're not 100% prepared to do, and 100% able to face the consequences of.
Never be forced into a situation based on someone else's wants or desires.
Never be forced into doing something simply for the sake of doing it.
Take charge of your own sexuality.
Masturbate. Figure out what you like and how you like it. If you don't know, no one else can either.
Filling the hole between your legs won't fill the hole in your soul. If you don't love yourself, no one else can or will.
Respect yourself. Don't use sex as a validation or an affirmation of your identity.
Just because they want to have sex with you doesn't mean they respect you, or even like you. Don't have sex with someone you're not prepared to deal with on one basis or another for the rest of your life. If you get pregnant, you'll have to deal with each other.
If you do get pregnant, you'll be the one dealing with it. He can 'be there' for you, whatever...you're the one going through the hormone shifts and body changes. You'll be the one giving birth, lactating, and dealing with PPD. Not him.
Sex isn't a lifetime commitment, but it should be fun.
Don't fake it. You're only hurting yourself if you do. Faking it doesn't get you closer to what you want, and it doesn't teach him a damn thing about how to make you feel good.