How you let this relationship progress should be totally up to you. What do you want, what do you feel comfortable with. How long have you known this guy. Have you had chances to talk to him without sex acts becoming a part of the picture. You need to make sure this is what you want, and that you know what you are getting in to. Make sure, if it means something to you, that it means something to him too. Very often, boys view engaging in intimate acts very differently than we do, and you need to make sure you are not going to be upset if he doesnt feel the same way/how he feels to begin with.
Do not confuse attraction with genuine feelings. If you are doing this because you like him, and you expect him to like you back/build a relationship you need to make sure that is the page you are both on before you go any farther.
if you have questions about how/what to do be sure to consult the sticky at the top of the Teen sex forum for more information.
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Do not abandon yourselves to despair.
We are the Easter people and hallelujah is our song.
Pope John Paul II