Break ups make me happy!?

So in the past 4 months at least 5 of my girlfriends which im close to broke off with their longterm relationships.two of them are going through divorce and the rest are relationships longer than 5 years each. Im not sayin im happy they broke up im just saying im happy That isnt happening to me...how can someone whos been together for a very long while break up out of the blue. one day they come and tell me theyre so happy in love and the next they want a divorce..and it scares me i dont want that to happen to me.i want my first and only marriage to last . i dont want soneone to leave me once it gets tough but now seeing this how do i know that even exists.its so sad ...i have a feeling ill be single for a while😣😄😞😒💜💔😈😡😝😂