My girlfriend has mild mental retardation?

I love this girl a lot and this fact is not going to change the way I feel about her. The thing is that her parents told that there is something I need to know before getting serious with their daughter. What they told me is that she has a condition called mild mental retardation and requires a lot of help in the things in life. I already knew she was kind of different but today they confirmed why. I told them that I will accept her the way she is and they gave me their blessing. I just want some advice about this condition and what to expect down the road in a relationship with her. She is 18 right now and I'm 24.
My girlfriend has mild mental retardation?
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