Cressida Bonas: Dating Prince Harry For Real!

Looks like Prince Harry is once again off the dating market.

Blame Cressida Bonas, his rumored new flame, for that.

The royal redhead and his new flame went skiing in Verbier, Switzerland; Sarah Ferguson, Harry's aunt and a family friend to Cressida, was also present.

The London socialite, who's been linked to him since May, is "keeping everything very close to her chest and isn't talking about Harry to anyone."

"She's very low-key and not a high-maintenance kind of girl, which is why it didn't surprise any of us when they first got together," adds the source.

"She's not affected by fame and she certainly isn't intimated by the fact Harry's royal."

"Cressida is a high-society girl and has always mixed in those circles, but she's incredible, fun and easy to be around. She's a good choice for him."

"She knows how to be discreet and she can cope with the pressure of being with him."

High praise from that anonymous E! source ... but the ski trip and previous sightings are all very much real. Sounds like these two are a legit item.

If you can call it that. Cressida Bonas, reportedly, is "just having fun" with the world's hottest bachelor, who definitely has a thing for leggy blondes.

Chelsy Davy ... the chicks in the Prince Harry naked photos ... it's his type!