Hi OP, I am single so I don't have any rules which led to success, but I do have rules to help me survive online dating with my sanity in tact.
It is so much weirder out there than I was expecting, a lot harder too.
The rules I try to follow:
Don't personalise any of their behaviour. Sometimes I used to think if I were prettier/thinner/better they wouldn't treat me like that - but actually, a decent man would never mess you around in the first place. This is always 100% about them, not you.
Do what you want - if I feel like texting a guy because I am thinking about them, I will. If they are not interested then better to know anyway.
Be honest about expressing emotions. E.g. if they are late for a date, express your annoyance. It might not endear you to them but you will feel better, which is the main thing.
I don't mind suggesting dates, but will only make 2 suggestions so if they can't make the first or second offered time, damned if I'm suggesting a third time. This weeds out the really passive types. Similarly, if they cancel, they can reschedule...many often don't.
You can't say the wrong thing to the right person - if you want to make a joke, or send a funny text just do it. Don't worry about the wording or agonise over it. The right guy will find you charming etc. whatever you do.
Finally, for the dreaded situationship scenario - you can't lose what you don't have. It may feel like you have some level of emotional intimacy and it could be a great relationship. But you don't. So who cares if you lose it, you never had it...
In solidarity! ❤️