Obviously she left after she realized that stabby will never return her feelings for him, she tried getting back together with her ex in attempts to make shabby jealous and push him forward into chasing her but in the end she witnessed her actions push him further away, as a final act of desperation to get him to chase she lefts all servers in hopes that shabby will contact her once agai. She just wants to hear shabby say he misses her and wishes that being together wouldn't be so difficult because she is his whole entire world. She is the only girl he thinks about, when he speaks to anyone else, it just makes him miss his time with her more.

⣿⣿⣿⣿⣿⣿⣿⣿⣿⠟⣉⡥⠶⢶⣿⣿⣿⣿⣷⣆⠉⠛⠿⣿⣿⣿⣿⣿⣿⣿
⣿⣿⣿⣿⣿⣿⣿⡿⢡⡞⠁⠀⠀⠤⠈⠿⠿⠿⠿⣿⠀⢻⣦⡈⠻⣿⣿⣿⣿⣿
⣿⣿⣿⣿⣿⣿⣿⡇⠘⡁⠀⢀⣀⣀⣀⣈⣁⣐⡒⠢⢤⡈⠛⢿⡄⠻⣿⣿⣿⣿
⣿⣿⣿⣿⣿⣿⣿⡇⠀⢀⣼⣿⣿⣿⣿⣿⣿⣿⣿⣶⣄⠉⠐⠄⡈⢀⣿⣿⣿⣿
⣿⣿⣿⣿⣿⣿⣿⠇⢠⣿⣿⣿⣿⡿⢿⣿⣿⣿⠁⢈⣿⡄⠀⢀⣀⠸⣿⣿⣿⣿
⣿⣿⣿⣿⡿⠟⣡⣶⣶⣬⣭⣥⣴⠀⣾⣿⣿⣿⣶⣾⣿⣧⠀⣼⣿⣷⣌⡻⢿⣿
⣿⣿⠟⣋⣴⣾⣿⣿⣿⣿⣿⣿⣿⡇⢿⣿⣿⣿⣿⣿⣿⡿⢸⣿⣿⣿⣿⣷⠄⢻
⡏⠰⢾⣿⣿⣿⣿⣿⣿⣿⣿⣿⡿⠟⢂⣭⣿⣿⣿⣿⣿⠇⠘⠛⠛⢉⣉⣠⣴⣾
⣿⣷⣦⣬⣍⣉⣉⣛⣛⣉⠉⣤⣶⣾⣿⣿⣿⣿⣿⣿⡿⢰⣿⣿⣿⣿⣿⣿⣿⣿
⣿⣿⣿⣿⣿⣿⣿⣿⣿⣿⣧⡘⣿⣿⣿⣿⣿⣿⣿⣿⡇⣼⣿⣿⣿⣿⣿⣿⣿⣿

+rep great guy, quick and easy :)