Is it normal to regret not talking to a girl 8 years later

In summer 2009 my family was taking a plane to Germany for a few weeks just as a vacation. I was 19 and my brother was 9. My parents were sitting in the seats directly behind us. My brother was on my right and he had the window view, I was in the middle, and to my left there was one empty seat next to the aisle. So I was planning to sit in the aisle seat so that me and my brother could get some extra space, but a few minutes later, before the plane was about to take off, a young woman sat down next to me. She was about 5'6" and skinny but athletic, with dark blonde hair and hazel greenish eyes. I got the impression that she was German and had been traveling in America and this was her flight back home, she seemed tired too. She looked to be around my age or maybe a bit older, like early to mid twenties. I wanted to talk to her but was just way too shy, and of course with my parents sitting behind me they would notice and probably want to know later what I was asking her. So I said nothing to her the entire 12 or 13 hours (New York to Germany).

I was even nervous about asking her to stand up when me or my brother wanted to use the restroom (we were next to the window and she had the aisle seat). My brother was sleeping a lot so I couldn't tell if he had to pee or not for most of the flight, but after dinner was served I had to pee pretty badly but just could not bring myself to ask her to stand up and make room for me so I could walk to the restroom. After a while she possibly somehow sensed that I had to go (or she had to use the restroom herself), so she stood up and walked to the rear of the plane. After noticing she was gone, I woke up my brother and we went to the restroom together, and I saw her standing and stretching a few feet away from the restroom, maybe watching if I was going to use it (or maybe not). A few minutes later she came back and sat down again after me and my brother returned to our seats. It all seems ridiculous now, how much I wanted to talk to her, not even like a full blown conversation - which would have been awesome - but just anything, but couldn't even say 'excuse me' to get her to stand up. I mean there was literally nothing on the line, we would definitely never see each other again and probably never become Facebook friends, but it felt really intense and embarrassing for me at the time.