same here, me and my otter wish they would end back together, i wonder if the author has said any clarifications on them or will in the future, but i can also see how after all the pain they both went through, they might also both come to the conclusion to move on with their lives after all that trauma, which may be more realistic. the marlo ending after all seems to be the one where owen is the most at peace, the properly happy ending for him. the one who gets always the short end of the stick is ollie, which makes sense, he is the one with the unrequited love crush i hope he'll eventually be able to move on from for his own sake