Are marital relationships definitely impermanent?

I am a teenager who has had the desire for a long time for an eternal relationship with someone. I usually do a little research into certain philosophies, and enlightenment and related things, but I no longer see hope that my wish is possible, and even though they say that the important thing is to enjoy the present, it doesn't solve anything for me, here comes the question in the title, Marital relationships are definitely impermanent? There is no way for a relationship to transcend impermanence? Other lives or after enlightenment (although I don't think it is possible in the latter)? No? It is inevitable?. I know it is a foolish desire, but what can I do?