Decent watch, probably won't watch again, and can't recommend.
I like Simon Helberg as an actor, but there is so little about this character that makes me care about him at all. And I like Melanie Lynskey, as an actor, and she's pretty too, but with Maggie Grace and her character, even from his perspective, it doesn't make any sense why there is a story here at all, he should just be with Kelsey.
I'll digress a bit, but he's just the embodiment of problems, and she's just using time invested as an excuse to keep torturing herself with a relationship she finds taxing with little benefit. Most of the movie is about how they're scared they've both sheltered themselves too much and might be making a mistake. It seems like they go and prove themselves right, and still come to an obvious and stereotypical conclusion.
None of this should be spoilers, it's a very blatant formulaic "break up because I want to know what else is out there" cliche of a movie, with all the standard features.
I'm not going to say you're wasting your time on this, but I will say that there are probably better movies out there to watch.
