Don’t let her sleep with those emotions.Tell her you love her. Assure her that she was the best thing that has ever happened to you. Make her think she’s worth loving, of course she does, right? Because she needs it even if she used those words “I’m okay”, she is not okay, not at all. If you can see pain in her eyes or anxiety in her voice, don’t let her sleep that way. Just don't. And no it’s not just being cheesy.
You love her?
 Then, prove it especially those times when she feels she’s not lovable.