The first half of this film is extremely powerful and effective, whereas the second half is awkward and boring. I feel very uncomfortable knowing that Albert Dupontel's character, Pierre, is close friends with his ex-lover and her new boyfriend at the same time. It feels like Belluci's character likes having him around as a confidence booster because he still fantasizes about her. Simillarly, Cassel's character seems to feed off of his low-self esteem.
After a second viewing of this film, I realized that it seemed like a conglomeration of incomplete ideas from the director's previous film "I stand alone" and his future film "Enter the Void." I was relieved to find out later that there is truth to this because the directer had originally intended to make "Enter the Void" and "Love" during this time. Through a series of miscommunications, time constraints, and budget difficulties, Noé was forced to create this movie from scratch in a very short period of time. Apparently, he only had three pages of script completed by the start of filming. As a result, a majority of the dialogue is improvised.
I much prefer "Enter the Void" as it has the same effectiveness as the gay club scene in Irreversible. Although, it doesn't have anything as powerful as the 9 minute rape scene.