I don't want to commit 

I see you have worked to put something fun together 

I have no idea how much time, thought, energy or money you put into it

Frankly I don't care

Something better might come up 

I wouldn't want to miss out on that if it happens 

I don't even recognize that it won't cost me a thing except a commitment, but I can't give those

Surely your feelings won't be hurt

It doesn't matter anyway

I don't want to commit