Why Upen patel will not marry Karishma tanna?

Bigg Boss contestants Upen patel and Karishma tanna will not tie the knot. Though the couple is madly in love with each other they will not marry. Upen had met Karishma's parents and Karishma had gone to meet Upen's parents in London. It was being assumed that they will be announcing their engagement very soon. But nothing of this sort is happening. The couple says that they want to concentrate on their career Period. Upen is looking for his comeback in Bollywood, while Karishma too wants to concentrate on her career. Thats why both are not interested for any kind of responsibility for now. See some pics of Upen patel and Karishma tanna together.