So many people are like that these days and I think it's so rude.
I have a few friends that do this. None of my very close friends do, so I know I'm not (too!) boring! The ones that do it talk incessantly about themselves then the second I mention anything about myself or if I even speak they glaze over or get distracted with their phone, or start looking out of the window, or change the subject back to them.
Even random people do it; if someone starts chatting to me in a queue in a shop or out dog walking or wherever they just want to talk and just glaze over or get distracted with something else if I speak.
It's so rude! It puts me off even bothering with conversations!