Scarey Just a question but when you saw the Tinder app on his phone last night, why didn't you just ask him about it there and then, especially given the conversation you'd just had about how he isn't seeing anyone else etc? I'd have thought it would have been a perfectly valid thing to bring up.
Just so you're aware, on Tinder you can set your distance and age profile - I have mine set to 10 years older-10 years younger 
with a maximum distance of 20 miles away. You say you've found him on there - did you swipe right (tick) or left (reject), or have you just closed the app with him on it so that when you reopen it, he'll be the first man you see? If you've ticked him, and then he ticks you when he gets your profile, you'll match each other! Personally I wouldn't be able to resist ticking him so that if he ticks you, you'll match, then you can see what happens. Either way, he'll see you're on there and it'll serve him right for pissing you around.
I really think you're approaching it in the right way - he's clearly stringing you along because if he says he's too stressed and under pressure to contact you but he can go on Tinder, he's lying. You're doing the right thing by seeing friends more, going out and perhaps on some dates. You never know, you might match to someone new and amazing on Tinder!
Get the Guy is a different author to Baggage Reclaim but they're both good. I've read GTG too and am going on one of Matthew's seminars in London in June. Really looking forward to it!
Btw, I haven't PM'd you about work yet as I thought you'd be at his house last night, so I'll do so in the next day or so if that's ok 
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Folk You can't set up a fake profile on Tinder because it links to your Facebook profile. You can change the photos that appear though.