You can't back out now. You said you'd go and you really should go. I learnt this lesson many, many years ago.
Any verbal invitation I get now would normally start with 'hey, what have you got planned for xyz?' and is usually quickly followed up by the standard 'oh that sounds good. I've got a feeling that I've got something on that weekend, but let me check and get back to you'. Works a charm ........... afterall I'm a busy person.
Or you could turn up and have an excuse, like you accidently double booked and can't stay too long. Have a good weekend!!
