Cute, but lacks depth.
I guess I can't be too harsh on an animation that was made for school, but you're going to be reading a lot of brief, useless reviews, so I'll try my best to contribute something (arguably) useful.
Here goes;
As far as originality's sake goes, imaginary friends were topical in a time years before our age hit double-digits. By bringing the premise up to an adult age in an effort to throw on a twist of originality, it becomes borderline pathetic for our protagonist.
Though I suppose that's a point, because we're forced into feeling pathos for him judging by the music, but by the time he's making out and groping air on his bed, the audience had already deduced he's bringing this onto himself, and instead of thinking he's a lonely man desperate for companionship, we've decided he's a lonely MAD-MAN desperate for negative attention.
That would be alright if it were outright funny, but the jokes were soft, and a little PG (even the makeout scene on the bed, if we were going by Disney standards). Again, I can't be TOO harsh, as it was made for school, but it was what it was. Sufficient.
The animation was all smooth, and in general there were advanced methods used throughout; this was not a lazily animated piece. Visually, it had a very cartoony look to it, but with very stingy sound effect selections, it didn't maintain a cartoony feel. It was very soft-key, and the SFX reflected that, but the sounds that were used were well chosen.
The music stitched everything together nicely, though as it was beginning to end and she was reaching for the rose, the percussions in the song seemed so out of place, that I stopped and thought, "What was that?" before hearing it again, and noticing that it's supposed to sound like that.
It's a well done flash! My only complaint is the writing...err...where was I going with that? Oh yeah! Sufficient. This flash is sufficient. Great animation, Good audio, but mediocre story and content...making it sufficient.
The story didn't prod the audience...didn't go anywhere different, or throw any curveballs at us. In short, it was predictable. Right down to him bumping into his better half at the end, making the flash come full-circle. With a story that revolved around a man maintaining a relationship with an entity that simply wasn't there, there were MANY possibilities for absurd, awkward, or otherwise hilarious situations, all of which were either missed out on, or simply weren't elaborated enough.
Take the person in the theater. Our protagonist goes for the reach around, and his hand winds up in their lap. Does this result into some incredible hijink, the likes of which we've never seen before? Does the person assault the protagonist, or even creepier, goes along with it with a blush and a grope? We get none of that, but a cut to the restaurant.
Buying two tickets? What if there was a homeless/ugly individual who had no money to get in, but our protagonist is too much of a jerk to give his imaginary girlfriend's ticket up to the poor slob, and leaves her there, taking his two tickets with him?
What of the waiter? Do the wine stains on the tablecloth come out of his pay, forcing him to come home with nothing, which results in a fiery loathing of our protagonist for "ordering him" to pour wine on the table? We'll never know.
Even the bed groping and air-frenching scene could've had a simple "confused-expressioned pet, looking on in disgust and horror" gag, but it was all very run-of-the-mill.
I'm just saying, that with a dash of creativity, shifting that nifty imagination into high gear, even a simple school assignment could've been phenomenal. This was sufficient, even though God knows you have the talent to do otherwise.
Keep up the great work! I'm looking forward to seeing more of your newer submissions where I'll be keeping a "5" waiting. Until then, I'll have to give this one a "4"