Why do guys just up and ignore you?

so annoying. like i get it if things weren't great and stuff. but when you completely get along with this person. went out with n a date and made plans for another. and continued to talk. everything was great. then he just stopped texting. i had asked him what time he was gonna pick me up, never responded. finally responded the day of saying he had to cancel. then nothing. then today i was like hey, and still nothing. i just dont get it. why so hot then super cold so fast. nothing was wrong.
Why do guys just up and ignore you?
Add Opinion