So i've been trying to find a book i read some time ago but i don't remember the title. Can any of you tell me what book it is? It's about two best friends that go on a trip to a cabin during the winter. One of them is gay and is crushing on the other one. Things lead to other stuff and the 'straight' one goes back home after a fight they have. Then his friend finds out that all that time, the 'straight' one had a tumor or something and tries to reach him in time. The book also has a prequel. I think the title has something to do with water, river, or something along those lines. If you know which book this is, please, please, please, please send me the title and/or author!!