Interest

How does it happen that the 80% of people who seem interesting to me are not interested in me? I mean they do not ignore me, we spend a lot of time together and we have fun, but they like only to speak about themselves. They never ask any questions about my preferences and interests. When I come across such guys I just put up with it and explore their minds, uncover their thoughts and study what they believe in. It is tremendously interesting but remebering that human nature is egoistic, I also like when sometimes people are interested in me.