Initially I remembered crying a lot at this ending.
But rereading it, reading other people's analysis made me realise ParaKiss was not a romance stoey- but more of a coming of age story. George and Yukari would have not worked in the long run. There was so much love and passion between them, but they suffered from miscommunication, unresolved issues, lack of willingness to work things out and compromise etc. It was enough that Yukari realised that despite all her misgivings during their relationship, George did love her after all.