A guy asked me out what do i do???????????????

my freind likes me and asked me out how do i say no i dont like him that way.how can i do somthing about our freindship???

Go out on a date with him. See how it turns out. If you are still not into him, break it off but in a way so that your friendship is not destroyed and the bond is not broken. Perhaps you should say, "I like you, too, but I don't think this is a good idea. If we have a bad break, everything will be shot to hell, and I really want us to stay friends forever." Sweet but honest.