How do i say no and get him to back off?

Well im going to tell you what I think you should do and im sorry if you don't like my opinion but here it goes. I think you should either break up with him or find out some way to get him to calm down. I wouldn't blame him because he probably just really likes you but you don't have or need to go through that kind of pressure. If he is pushing you too hard to make out with him then he probably isn't too good of a boyfriend and he doesn't deserve you. I hope everything works out though and good luck. Thanks.