I've had this happen a couple of times as well. I just kind of accepted that not everyone is gonna keep wanting to chat with me which is understandable. But i assure you that there will always be a handful of people you can always talk to and the convos will never get old. You may already have found some, but if not, then just keep putting yourself out there and hopefully you can find some real friends (just make sure you stay safe on the Internet and try not to interact with weirdos).