Umm.
Its not entirely frame by frame. There's quite a few looping movie clips actually. Including the faceless crowd walking. The guy probably shouldn't take that girl back either if she ditched him for a big buff dude. She needs to learn a lesson. Smack her or something.
Overall, the animation was decent I suppose and I watched it and understood what you were going for, but in my opinion the ending felt wrong.
Bad animation
Yeah it just bored me
Nice but..
... it was a fine animation, but i don't agree with the message
A terrible moral
It's supposed to be uplifting and inspiring (I assume) but the moral is terrible. You should NOT take back someone who cheated on you, because if they really loved you they would never leave you.
Not very good
I kind of liked the style, and how everything inverted when they met. But I don't really like the story at all. So what, the girl leaves the guy for an annoyingly stereotypical jock (flexing his muscles in every instance involving him), and then eventually goes back to the first guy in the end, making everything ok? I'm not sure what kind of message this is. This is the kind of flash that's meant to be very, for lack of a better word, "sweet", but this story isn't very sweet at all. It's just like... a typical thing that happens in other relationships, and just makes the guy look like a pushover and the girl as shallow.
And also, I'm really not a fan of the ever growing-then-shrinking heads thing you've got going on here, or the lack of really any scenery and copy/paste featureless people. Especially how the people at the start are moving their legs but not moving anywhere. I liked the music, though.
It's a pretty good try, but not a good cartoon. There wasn't anything objectionably bad, I just wish it was done better. It's the kind of movie that tricks people into thinking it's sweet when it's really just pretty generic.