Causation of i-adjective When conjugating an adjective to its causative form, the way to go about it is as follows. For example, (Won't let/make you lonely) Question is, what happens if I use instead? Doesn't this also mean "Won't let/make you lonely"?

In a view of Japanese, just "" means "Won't let/make myself lonely" and just "" means "Won't let/make you lonely".

Your context is "" = "I won't let/make you lonely". This is a usage of oral communication and not have sense of formal.

In this context, it is same meaning of "", but this is a usage of written communication and have sense of formal.