Stop worrying all the time.
When you're talking to someone in a chat, you're limited in your ability to communicate. This is not an accusation, no one can exactly predict how a text will be understood. That's what we have intonation, body language, and a lot of other things for in real life. We just can't see that in chat.
Also, we all have lives of our own. No need to worry about ditching chat when something urgent or important comes up. If you're feeling guilty, just make a small apology and maybe explain what happened.
So if you're misunderstood or something arises mid RP or whenever else, don't beat yourself up over it. We've all probably been there.
Also, you're not obligated to continue an RP, if you're uncomfortable or bored, say...
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