It could be he's being rude but it could be he has been busy. If you're still keen on trying to meet up with this guy, I suggest -- instead of texting -- you call him and ask whether he is free for dinner and give him two possible dates in a week or so's time. That way, it's not a last-minute. Also, texting is such an impersonal way of contacting someone, and it's much easier to read someone's voice than his SMS message. However, all this being said, it..might be that he lets you down; you should be prepared for this as a really possible scenario and..be ready to move on right away. Other crushes will come sooner rather than later!..