Dating with social anxiety disorder, awkwardness.?

I'm 23 years old and I suffer from social anxiety disorder. I honestly believe its a miracle that I have friends. However, even though I'm extremely self-conscious and apprehensive when I go out, I've been working really hard to get over my awkwardness and unrealistic thoughts in social situations. Recently, I met a really nice guy. After talking on the phone and texting back and forth, we discovered that we share several common interests. Long story short, he finally asked me out. Because I have a reputation for being extremely awkward, I am dreading spending time alone with him. I think I'm awkward because I'm always so painfully self-conscious in public, as a result my self-consciousness always leads me to say and do awkward stuff, but I digress. I wouldn't be able to live with myself if he stopped calling me because he thinks I'm weird. I'm not desperate, codependent, or starved for affection, nor am I one of those crazy "if I'm rejected I'll kill myself" type of girls. If things between myself and my new guy buddy don't work out I'll be fine, I just don't want to be rejected because I did something stupid, or said something I don't mean. Ultimately, what I'm trying to say is that I really like this guy, how do I NOT f### this up?