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Years ago I looked into lucid dreaming and found that those communities have catalogged several actions that can act as "reality checks".

Generally in a dream, some things pretty consistently don't work right. Clocks/watches, mirrors, light switches. Check one of those and see if anything looks weird. If it makes no sense, probable that you're dreaming.

Try to remember the sequence of events that led to what you're doing now. In a dream, there wasn't anything before.

Or my personal favorite, plug your nose and then try to breathe through it. In a dream it will work.

There's quite a range of other methods out there too.

Dreams feel different than reality. Reality feels more real.

Unless there is another deeper layer of reality that feels even more real that I have forgotten in this dream. Can't really rule that one out.

'Cause if I were dreaming, I wouldn't still be living with my parents as a single ass loner working at dead end job and whom still can't afford his own place and doesn't do anything with his life 'cause 8-5 gives me no time.