He's stood me up once, i have a feeling hes going to do it again tonight!?

You seem to be faulting this guy. Why? You seem to think he's being impolite and inconsiderate and it's very likely he isn't behaving correctly. But, why should he bother behaving? You tell us that you've met a "great guy", and in the same sentence say you've made a date with a different guy for tonight. This prince has even said he wants to see you while you're still single- and YOU agreed to go out with him. Planning to sample one last guy before you marry your great guy? Heck, perhaps you could have a quicky before you head for the church on your wedding day. Lady, you aren't ready for a "great guy" and you aren't ready to marry this, or any other guy. Stay single until you mature enough to realize that your actions impact other people.