blowjob?

First your 12 that's close to 13 so I know that you at least knew what it is because of tv and music these days and you should have told him to fuck off that your to young for stupid shit and tell your parents what happened I don't want to hear any lame excuses either so tell what happened but don't come here acting innocent that's not going to grab any attention or sympathy just tell an adult.

Hell to the no
Are you even ready for this (if he think about having sex)
You really should think about these things because
bad move can change your life forever

I guess just tell him you don't want to and that you didn't know what it meant when you agreed. Not sure what else to tell you, sorry. :/

Say hell nah if I were you I wouldn't agree with things you didn't know about plus your too young for active like that

Your not old enough to give a guy that anyway and your decision will effect your life forever, so think before you act.

tell him he got cuddies

OK first of all your way too young to have any kind of sexual contact. Second you should report this to your parents and/or his parents if he keeps on pressuring you. You should tell him no and if he doesn't accept that then he's not at all a friend trust me I know how guys works. They will pressure you into doing something sexual to them god knows how many times I got pressured into doing something sexual. I'm 19 and I never had sex I even hate sex and sexual things but I got pressured until I gaved a guy a blowjob and/or a handjob.