why some people loves to talk about other's life?

Unfortunately, people probably won't ever stop gossiping, and the reasons why they interfere with someone else's life could vary. Maybe they're jealous... Maybe something in their lives is missing, maybe they're lonely, and talking about others makes them feel better.. Maybe something in their life has gone wrong, and talking about someone else makes them feel better...So on, and so forth. I'd say the best thing to do is to ask them politely to mind their own business, or just to ignore what they've said. Those who know you won't believe it, because they'll know the truth, and even if they do believe it, were they really that great of a friend anyway? Also, try to keep in mind how pathetic the gossipers really are.

Yes I did. It's a really big mistake to mind other people's business. That's why I keep on reminding to them, "small mind talk about people. Medium mind talk about events. Big mind talk about ideas."