_Burying the Ex_ is a fun zomromcom (see also: _Warm Bodies_, _Life After Beth_, and _Idle Hands_). Not sure how this got an R rating, there is minimal violence, and it's basically a cartoon when it does happen.
At face value, this is a simple story: Max is in a relationship with Evelyn - who is played by the beautiful Ashley Greene - as their relationship starts to deteriorate, he opts to break up with her, which is interrupted when she gets hit by a bus, resulting in her death.
She comes back from the dead - and still looks hot - and wants to keep the relationship alive... or at least undead.
The movie is more comedy than horror, but it has several allusions to horror movies, and Halloween - no surprise seeing as how it is directed by Joe Dante. Also, we get a Dick Miller cameo.

With the review aside, I want to talk about the relationship issues, Cinema-Therapy style. Early on, we can see that both Max, and Evelyn don't know how to properly communicate. Neither of them see or hear each other. It's difficult to pin down exactly which issues Evelyn has, but I am going to say she is a hardline anxious preoccupied (AP) - I was thinking maybe a fearful avoidant, but it's only because she displays what could be NPD or BPD traits. Suffice it to say, she is a 10/10 AP: some of the behaviors she shows are jealousy, fear of abandonment, passive aggression, and major boundary violations. Max is not without his issues, only he is not fleshed out as much as Evelyn, so I would have to say he is a dismissive avoidant (DA) - I'll get into that more in a moment. Both Max, and Evelyn need to work on their listening skills (e.g., reflecting, empathizing, comforting).
Now, this is my assessment during the time Evelyn was alive, however, once she is a zombie, I believe the movie works as a metaphor for Max's issues, including not properly processing the breakup (Evelyn's death works here as the death or their relationship); she may be gone, but he has not actually moved on, which is why I think he is a DA. DAs will ignore grief, and instead bury their feelings because it is too difficult for them to handle. There is also an interesting concept called the phantom ex, with DAs, which works perfectly with my analysis.
Okay, look, I realize the movie isn't trying to be this deep with the story, but I think there is much to be learned here.
Even though Max would like to move on, and be involved with Olivia - who is played by the also beautiful Alexandra Daddario - his phantom (read, zombie) ex keeps getting in the way.
If we look at Evelyn as Max's inability to work through his grief, communication issues, attachment trauma, fear, and anxiety, we can see that these problems don't simply go away. If they are not dealt with properly, they will affect your work, your friends, your future relationships. They cannot be buried. They will come back, and follow you as long as you allow them to... like a zombie.