Is it normal for the internet to do this to me?

I'm on my computer often. I go on very few websites (youtube, this website, wikipedia)just because they're the only ones that I have any desire to visit. I rarely ever go on social networking sites, because I think they're stupid and annoying, however I do have a facebook. The only reason I have one is because the idiots of today's world can't seem to communicate with others any other way so in order to stay in 'the loop' I am obligated to have one. Now, I still barely ever go on it even though I have one, but there is a particular reason why this is, and it has nothing to do with me thinking it is dumb..
Whenever I go on facebook(and most other social networking sites like myspace, etc. but facebook especially)I instantly get this feeling of absolute dread. It's not at all an annoyance with the website or the people who use it necessarily(like I told you about earlier, this I feel is completely unrelated), it's not even something I can control. It's overwhelming. It takes over my body the moment I enter the site into my browser. I can barely explain to you how awful of a feeling this truly is. It makes me feel alone and helpless. I feel empty inside. The world seems like such a dark place, and I become enveloped in this immense, cold, sickening feeling of total darkness. I feel like I've lost all hope in the world and in myself. All from this one website. In fact, I don't even need to be on it to feel this feeling. I just have to think about it. Sorry for the long post, I just don't understand how or why this happens.