Why do girls that reject me get mad when I burn bridges with them?

I basically stop talking to girls that reject me and most of the time they get upset that I do that. I have no time to continue talking to a girl I was interested in that rejected me. I'm better off pursuing another girl instead of wasting my valuable time trying to convince her to go out or give me a chance.
Why do girls that reject me get mad when I burn bridges with them?
Post Opinion