"मैं तुझसे कम सोता हूँ।"

Translation: I sleep less than you.

[kooprad]

तुझसे vs तुमसे ?

[LinguisticBoi]

तुझसे is the least formal, think of it as going with तू
तुमसे is semi-formal, goes with तुम
आपसे is most formal, goes with आप