Me and this guy like each other so I assume he will be asking me out soon. But the thing is I know for a fact that he had sex with his last girlfriend. I'm defiantly not ready for that, we are only in grade 10, I'm just not sure if he's going to expect that from me. I'm just wondering if I should even get into this relationship.

He has not asked you out and how do you know for a fact that he has had sex? Were you there? If he does ask you out, you simply tell him that if he wants to date you, fine but there will be no sex. Or you can say "no, I don't want to go out with you"

Try to think in terms of people hoping for something out of a relationship, rather than expecting. It gives you more of a realization of control over yourself and your life. I know that when you are a teen, it seems like you spend a lot of time figuring out what other people think, want, expect, or are going to do. They don't have any more power than you do, and they are wondering what other people think and want too!
That way if it gets to sex, you are prepared to say where YOU stand. And if you say no, the other person has to accept it. If he complains about 'everyone doing it,' you say 'I'm not everybody' and walk away.

Same guy who was scared of your ex, or is this another guy?