How to explain the trinity do a non-believer?

How to explain the trinity do a non-believer? I have a girl that I’m interested in, she was raised Christian, but as an adult states that she loves and honors Jesus Christ, but can’t understand the Trinity and states she thinks it doesn’t “make sense”; that if Jesus was born of Mary he can’t be "fully God’ cuz he’s part human. How can I explain the Trinity to her in a loving way that she can come to understand?

These links should give you the answers that you need. If you have any further questions or concerns that are not answered by this, please contact Catholic Answers directly.
Recommended Reading:

[LIST]
*]Explaining the Trinity
*]How to Understand the Trinity
*]How to Understand the Trinity (Encore)
*]Can you explain the Trinity in plain language?
[/LIST]

DISCLAIMER: The views and opinions expressed in these forums do not necessarily reflect those of Catholic Answers. For official apologetics resources please visit www.catholic.com.