I'm sorry you're having trouble! If the game is suddenly crashing there's a few things it could be. Your firewall/virus scanner may force the game to stop then crash while playing. Turning your scanner off while installing/playing, seeing if the antivirus program needs an update, and/or finding a way to tell the scanner that Our Life is safe are ways to potentially fix the problem.
Crashing problems are also sometimes caused by issues with settings for your graphics card(s). Or you can try making the game easier to run by turning off animations and playing in a smaller window, since maybe the game is just struggling to run for some reason. I hope one of those helps!