A source told The Daily Star: �Simon is so smitten that he�s also talked about popping the question as soon as her birthday in May. It falls over the bank holiday weekend so he may plan a trip away and do it then.�
The Brighton based businessman is said to be convinced that the singer is the one and the singer seems to feel the same.
The insider went on: �He knows she�s the one and Simon�s pals have never seen him so happy. He�s like a different person.�
�She said how she felt like she was �living a dream�. And she just kept gushing about this being the best relationship she had ever been in.� a friend revealed.
Even if Simon doesn�t decide to pop the question in May both of the pair are convinced they have found the �one� and are already planning a future together.
�They�ve spoken about their future plans, how they want to buy a huge house in the country and have two or three kids.� The source added.