If you’re not getting signals from them then you leave it at that.

But not getting signals is the default from people who don’t know you. How are you expecting to cross into a place where you are getting signals if you always stop before actually interacting with someone?

If you can’t flirt with people you’re basically closing yourself off to 80% of the world who might give you a chance after a single conversation.

Go interact with people. Some of those people will give you signals to back off. Some will not give signals at all. Some will give signals to continue. If the “no signals” means stop to you, you’re gonna have a rough time even making friends.