cuckold experiences in high school

I had a black girlfriend in high school who was very pretty with a long pony tail and big tits, medium complexion and a sweet permisterality. She stipulated though that she wanted our relationship to not be publicly known so I would have to keep my distance during school. I used to watch her from across the quad, talking, joking and from what it appeared, flirting with other guys. All the time I would think to myself, "Gee, she is supposed to be MY girlfriend but I can't even be seen with her and she can chat with guys from the football and basketball team freely." We ended up breaking up of course as she wanted to date other people. I guess cuckolding me wasn't in her mind and she wasn't sadistic at all.