How do I manage this relationship?

I have a girlfriend, and we met not long ago. She's 21 and I'm 22. Everything's fine between us but the problem is that her father is very concerned about his daughter, very protective. She hasn't introduced me to her parents yet, in fact they don't even know she's met me.

I'd love to spend evenings with her at her house etc. but with her father it's almost impossible

How do I manage this relationship?
How do I manage this relationship?
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