How difficult was it for you when you became single after being in a relationship for a while?

I’ve been with my boyfriend (we lost our virginity to each other and everything) for 6 months now and honestly I hope we are together for the rest of our lives because I would be soooooooo heartbroken if we broke up...... I can’t even think about it haha but I do worry sometimes because the reality is like 99% of relationships seem to not last forever. We both think we love each other enough to stay forever but time will be the real test. Many things could change including ourselves🙃