Then honestly you guys are in no place to be boyfriend/girlfriend. I'm assuming you guys are in high school. Don't worry about labels and just have fun together and do stuff. Maybe go bowling or to the movies. If you aren't excited for romantic things then you two probably aren't actually at a couple stage yet.
How long have you been together? Just tell him you're not ready. Either you're not ready for a relationship or he's not the right guy. If it's only been a date or two then just say you're not ready yet for that.
Nothing says you have to tell him about your First kiss here, dear, so Simply explain to him that you are Not this Ready Betty. If he really cares about you, he will Accept You and your Explanation Unconditionally. However, as time goes on and you are still Not Feeling him, It's Best from the Rest to be Merely tell him in being an Honest Jane... I do not feel the Same. Good luck. xx
So you're under 18 and with a guy you don't even want to kiss. Either you're too young to be in a relationship or you just don't like this guy. Like I can't even imagine being with a guy I didn't want to immediately kiss once we're together. That doesn't make any sense to me.
How did he expressed that he wants to kiss you? If you think he doesn't like you and dating you just for kissing he's not worth it. I suggest you wait a little while and test him then make your decision