Could I have some advice please?

You are overthinking it and you shouldn’t.
People probably have a lot to deal with so it gets hard for them to reply to dms.
Me personally I hardly ever reply, not because I don’t want to it’s just I’m not motivated to talk to anybody be it my best friend or sister or even mother.
People also do that to me too but I don’t feel bad because I know they are either busy, or they just feel like me most of the time.

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