How Do I Introduce My Boyfriend to My Parents?

Every time i'm going to hang out with him or have a sleep over at his house, i've been making up an excuse. I can't seem to work up the nerve to either my mam or dad. So do i just go with the if it ain't broke, don't fix it root and keep making shoody excuses until they either find out on their own or i move out of the house? Or do i just work up some balls here and tell them that i have a boy friend? Well, they're going to find out eventually, and when they find out, you're not going to have control over the situation. You make up excuses to your parents and