You seem very needy and insecure. You worry about what he thinks in order to fulfill your own happiness. Who cares if he is into you as much as you are into him, as long as he IS into you. The fact alone that you try to talk to him about how he feels in some hopeless effort to make him feel more for you shows that you don't really understand the situation, but you'll sure try to manipulate it.
As for him saying that, you didn't just not take it as a joke, you blew it up into a huge thing because he didn't say what you expected him to say. It is almost like you want your boyfriend to be an emotional puppet for you, and not have his own space, time, or emotions. Searock has it, you need to work on your insecurities, guys who respect themselves will only take so much dramatic BS before they tell you to screw off. As a 28 year old guy, I know how I would feel in your boyfriends shoes.
"All is fair in love and war." - Francis Edward Smedley