Lack of sleep because of insomnia doesn't just make you feel bad. It's an direct threat to your health. It will get bigger and it might develop depression and stress. It's also very bad for your immune system. Lack of sleep will make you be tired all the time and make get older faster.
If you suffer insomnia you should not wait, you must take action now. Using sleeping pills is not a solution, if you want to really cure insomnia read first post.