Didn't happen to me, but a friend of mine had been in a great relationship which he chose to end once he met the other girl. All four of us were friends and everyone knew what the situation was. The ex-girlfriend was devastated after he broke up with her and I was so pissed at him for doing this that I haven't spoken much with him or his new girlfriend ever since.
It wasn't a pattern at all BUT we all change especially during our teen young adult hood. We have different iny rest, wants, needs, desires. That's because we are growing up finding ourselves. No one has no right to judge you so I'd you are doing this don't be ashamed it's called growing up and finding someone else who can fit your new needs. Survival of the fittest.
I stayed for both cuz as much as the other had other smilitaries my boyfriend at the time had stronger qualities than the other. I also was either to in love to leave or just a dumb teen. ...
I left the 2nd boyfriend because life js to short to be withsomeone who either gives you drama trouble feeling insure abused unwanted or just overall...2nd placed. I'm always first ( equal to you mama) so I should never have to feel like I am begging for your attention or anything negative. Plus if you don't check off everything I really am wanting then BYE Lol