Witness tells of Alien encounter with Greys while living on American Airforce base in England, Visit to Area 51

My father was in the US Airforce stationed at Mansfield. My parents would go out in the evening leaving me with a sitter. I would be asleep when they returned. One such night, I awoke to my ceiling light being on in my room. I got up to turn off the switch and noticed all the lights upstairs were on. I walked out of my room to the upstairs landing and turned to see a figure in front of me. I was afraid but the figure mentaly told me not to be afraid, everything was alright, and to turn off the lights and go back to bed. I turned to my parents room to turn of the light and my parents were sprawled across the bed like they had been thrown there. They drank alot so who knows. I turned off the light and noticed the downstairs lights on and the front door wide open. I didn’t see the figure anymore. I went downstairs, turned off the lights, closed the door and went back to bed. In the morning I tried to describe what happened, my mother thought I saw a mouse. I was frustrated at her not understanding me. A few days later we found out that a close relative, also in the AF had been killed in a car accident in Alaska. From then on I always assumed that I had seen a ghost. The figure looked like a ghost but had bright blue eyes. I was 5 years old at the time. In the past few years I have wondered if this was an alien encounter. When my dad was alive I asked him about UFOs. He never saw any but did say he had made a delivery to Area 51. He was at that time stationed at Nellis AFB near Las Vegas. He was a chief master sargent. He and another guy delivered an aircraft engine. They were surrounded by armed guards and not allowed to dismount. The engine was unloaded and they left.