Not to be too critical, however watering your orchid or any plant for that matter everyday is a very bad idea. Orchids need to be watered once a week. Soak the growing medium well, and allow to drain away excess water. Allow orchid to dry out then water again. Best way to water is to soak in a tub of water. Make sure your orchid has air flow around the roots and orchids will last for years, just be sure that after the flower is done you reduce watering to maybe every 10 days, and cut the flower stalk off around 10-12 inches from the leaves. Hope this was helpful.
How long your potted orchid will live depends upon how well you take care of it. In the best of conditions you will be able to have it live indefinitely. If you have any other questions about it, a great source for answers is http://www.orchidcare.com/faq.htm#q7
I have some potted orchids that are 40 years old. Of course in that time I have divided them. With good care and luck they do last indefinitely. However, sometimes the best growers loose plants and it's a complete mystery as to why. Just follow the cultural guidelines for the specific orchid you have and you should be able to rebloom them at least for a few years.