Kim Kardashian shopping manicure pedicure white engaged

The second fiance Kris Humphrie's not around, Kim's got a new tall hunk to watch her back ... and we bet he was watching her back pretty closely!

Even in 5-inch platform espadrille wedges, this hottie towered over little Kim. And he sure was the gentleman Friday as Kim left her house -- holding the car door open for her and sticking close to protect her from the paparazzi ... What a good guy!