Just need advice

So there is this guy I like and we text each other basically all day every day and stuff I was just wondering, if he tries to kiss me what do I do? I have never been kissed, and I want to kiss him, just not yet. I don't want to kiss anyone unless we're in a committed relationship. I'm just afraid if I don't let him kiss me he will think I don't really like him😕 what do you think?