lol This is why Im 30 and single. People over analyze the most minute things and jump to conclusions (for better or worse) and then argue over things that are completely unknown and miniscule.
Name, I don't blame you for asking questions and trying to piece together the facts of this situation to get a clearer picture of whats going on. You like him so (if I were in the same situation) it would be impossible not to analyze and possibly over analyze the facts. Of course you're going to be thinking about it.
All you have to do is sit back and wait (which is what you said you are already doing) and he will either contact you or he wont. If he does, meet him. If hes a good guy and he wants to see where it goes with you he will tell you on his own what happened with the other woman, maybe not details, but just that its not going to work out. If he meets you and doesnt mention it, ask him.
Not in a confrontational way, but just a "hey, so how did it go with <other woman>" If he is honest with you either way then you have your answer, but if he downplays it but says he's seeing her again, while remaining interested in you, there's your red flag.
Texting you that much in a week, meeting her in person, and then meeting you in person would be enough for any guy to make a decision. (at least it would be for me) If you meet him but he continues to act unsure, drop him.
More people need to be optimistic and give others the benefit of the doubt. Innocent until proven guilty. I dont mean trust strangers fully, but just remain neutral. If someone has a guilty until proven innocent mentality and are always looking for a reason a guy is a douche, then every guy is automatically a Douche.
Whether he will text when he gets back wanting to meet you is still up in the air....