What should i do about my haunted houseee ??! ?

So im like 98% suree my house is haunted, my lights Flicker on & off, i hear a little girl voice, my friends say they see things when they come over, just the other day my friend was over & she said she seen like a fog kind of thing come out the laundry room when i opened the door & i seen it too. i mean i think its nice? it hasnt done anything to hurt me nd ive been living here for about 5 months. my parents even say they think its haunted. can i do anything about it ? i want to help her pass on & go into the light.