Overall great work. Well edited and I like the style. I especially like the split shots.
I only see one real minor problem, that is the slight discrepancy in the switch into the shot where he grabs the vest off the couch. A split second off the beginning of the shot would be perfect.
other than that no problems, but I'd say it could use a little more movement in the lip synced scenes (by the actors or the camera itself), and try to experiment shooting at different times of the day.
These scenes could also benefit from a slightly lower frame rate. Doesn't sound like much but it adds.
Also, the argument scenes could use a little more camera movement in the intense parts, and quicker switches between shots can also add to the tension (try close up facial shots mixed with the shot of the two of them)