i think that a lot of love naturally ends just from changes in the two people if not any personal failing/toxicity. ive only been in two half-romantic relationships in my semi-short life but neither of them lasted too long of a time
with that though i do think that many people can have long-lasting relationships, like my gran and grandpa who have been together for a really long time. so there is still hope for u and ur relationship
i think there are MULTIPLE people for everyone due to the pure amount of people who exist on earth but also some of those people might be in rural china or australia and 3483409584 miles away and you'll never know them. but luckily theres multiple. ya. i dont know if this is helpful or really rude sorry