It's annoying to be around depressed people, because they're always negative.

Why are you around them in the first place? Do you seek them out?

I'd tell the person that there's no point in being depressed.

The only way out is to literally stop being depressed and being at least okay instead.

Kill them

Because I live with them

Breed them, forcefully without their consent, then use a red hot rod and do the "needful" saaar

take care for yourself, otherwise you cant help

just tell them to smile bro

Is it the mom?

Give us more context first so we can advise you... Is that person a family member, a friend, a gf/bf?