Can I say this to her? What should I do?

[Rouge]

"Going out" and sleeping together are two very different things. I have numerous female friends who had only slept with less than half the people they'd "gone out" with. She may be perfectly happy with the way things are.

either

1. Talk to her about it and accept what she says; or

2. End the relationship and don't get into another one until you've figured out your priorities.

[AussieBloke]

Sleeping together isn't going to happen.

If she wanted to, she would have made it very clear.

If you wanted to sleep with her, and had a room-mate, you'd make the room-mate bugger off when you knew she was coming over.. see?

Shes using you mate. End it.