Hey, from an extroverted person, your friends don't think you're a bad friend, they know you find social stuff exhausting, they don't begrudge you, they're just happy to hear from you because they like you.
It's okay, do what you need to do. And, hey, sometimes I forget to reply and get back to it weeks later, too.
Speak for yourself, if someone ghosts me like that twice, I'm quite done with them. I am an introvert and I take the time at least once a day to reply to all messages from people I care about. Which's like 3.
To be fair, this only happened twice. I have friends who consistently take days to reply, that's totally fine with me. But if I send a message, couple weeks go by without a reply or the person initiating conversation, and then it happens again, that means that they don't care about talking to me, which's 100% their right 🤷♂️
If someone is going through a hard time, dealing with depression and whatnot, that's different, but also the exception.