Is it ok to live in a house thats cold? (68 degrees f) i always feel cold but i usually like it cold. is it healthy to be cold?

No risk, no worry: It is an old wives' tale that cool temperatures are a health risk. In fact, there is no increased risk for any health problem. If you're comfortable at a particular temperature, it's nothing to worry about. The main problem comes in personal relationships, i.e. people who live together and must negotiate different temperature comfort. But that's all.