The "Vanderpump Rules" star was greeted by a photog Wednesday outside of Blush Nail Bar in Valley Village, CA -- just outside of North Hollywood. She was sitting there all by her lonesome ... and was certainly ready to answer questions, unlike earlier in the morning.

Remember, she was caught on camera at LAX not too long before this ... and was radio silent on the cheating controversy, only giving courtesy nods and waves to paps.

Here, though, she's fully opening up about ... well, everything. It's interesting to hear her perspective -- the first time we're really getting her side of the story, and how things stand.

Check out the convo ... RL addresses everything from taking accountability for her actions -- which she says she's prepared to do at the reunion taping tomorrow -- to an attempted reconciliation between herself and Ariana Madix, which doesn't sound like it went well.

Of course, she's teasing the big reveal ... which will undoubtedly be aired on Bravo in the near future. But even with the obvious promo involved, she's quite transparent here.

Raquel touches on where things are with her and Tom Sandoval -- and one line of hers is revealing ... she says they're not labeling things and not sure if they'll stay together. At the moment she says they're on a "break" ... and they'll see where they go from here.

Another topic that's addressed ... the alleged attack from Scheana Shay, which Raq seems to be implying did in fact happen -- if the scar on her eyebrow is to be believed.

There's more Raquel dives into ... Tom Schwartz and his rumored knowledge about all this included. Give it a watch -- it's fascinating how much she actually spills on camera.