Your best bet is your second choice which is seeing if he will see you face to face. I may say something but I wouldn't appear rigid. It really is way too early for you texted me these days but not those days. I would schedule dinner just to get to know each other but you are going down a dangerous road. Just bring up that you was wondering what held him up and then leave it at that. Focus after this on getting to know each other rather than his schedule. I understand your concern and it is weird but anything could have happened. If you find out he isn't interested then just move on. I bet something happened and he has a good explanation.
If this has been helpful press accept
Would it be appropriate to send a text if a face to face cannot be had to ask if he's still interested or not? My text would go something like this "Hey.... I know you've been busy lately If I'm pressuring you or something has changed with your interest in me will you please let me know. Whatever is happening between us I just want us to keep lines of communication open and always be upfront and honest with each other just like you was with me when we first met. Would you be interested in going back to Yn or to dinner to talk and continue to get to know one another or has something changed?".