There's a happy ending!! (Spoilers)
The movie sort of ends on a bad note, but that was pretty obvious from the get go.
As sad as the final minutes of the movie were, it does end with a bit of hope.
I think RJ goes to visit Chris, and in my mind they go on a cross-country road trip together like that ex-army guy suggested.
I just wished they had filmed it and included in the movie. I guess it's kind of ok though because they left the ending up in the air and that allows the audience to finish the story in their heads.
It's a pretty good movie for a low budget movie. The acting from the leads, in my opinion, were pretty much superb.
Wouldn't it be cool for them to release a sequel?