As with any chronic condition there's a very real chance of depression and you have to be aware of it creeping up on you and take measures to ensure you don't sink into it. Talk to your doctors, your family, friends and your partner, however it's all too easy to just avoid it in case you make people feel uncomfortable or bring them down. I hate to say this but some friends (and even some family) will just fall away, they won't be able to cope with the disease and the limitations it places on you.