I've encountered this problem too. People will say nice things to you when you pitch or show them something because it's easy to be nice and they want you to succeed. Maybe they imagine their optimal future self using your product. But things may not work out that way. There's also the issue of solving a genuine problem but later finding out that it's not a valuable problem.
There is a solution: stop showing people your product and start casually asking them about their problems. Then you can begin to understand if you are solving real problems and how much people care about them, e.g. if they have already parted with money (or time) trying to solve them. Don't ask leading questions, but do prompt them for specific details about their actions. Don't ask anything where the answer is to any degree hypothetical. It only takes five minutes, just don't mention your product!
Of course this requires you to be in the same room as your potential evangelist early-adopter customers. Go put yourself in that room ASAP.
There is a solution: stop showing people your product and start casually asking them about their problems. Then you can begin to understand if you are solving real problems and how much people care about them, e.g. if they have already parted with money (or time) trying to solve them. Don't ask leading questions, but do prompt them for specific details about their actions. Don't ask anything where the answer is to any degree hypothetical. It only takes five minutes, just don't mention your product!
Of course this requires you to be in the same room as your potential evangelist early-adopter customers. Go put yourself in that room ASAP.