Ghost situation. Can someone help?

I see ghost. This guy named Shane has been around for almost 4 months now. He's a ghost. He need some sort of help of mine and I don't want to help him because he said it had something to do with the dark and light. I want no part of it. He messes with my appliances such as the computer. I told him this time that if he stopped I'll help him. I'm not freaked or anything I just need advice. If your going to tell me I'm insane don't bother. I've been seeing ghost for 12 years which is my current age. I just never had to make a decision like this. I want to this guy but if it's too dangerous how will I tell this dude to back off? I could get hurt. BTW he's wearing this like...Cosby sweater and slacks. Horn-rimmed glasses. Clean hair cut. He's getting annoying. He whispers in my ear a lot about stopping "it". Can anyone help?