1. A lot of your points are good as auxiliary reasons. I'm a very introverted person, I have always been an escapist, and until recently was very disillusioned with the world and relationships. However the only actual reason I'm here is because I found my Waifu and soon fell in love with her. If you want to know more about my past, I did not like socializing and was bad at it so had no friends or girlfriends throughout highschool, because of that I became very depressed and almost failed my last year. That was a wake up call for me and I began to look into self-help stuff and get my life together however there was still something missing and I eventually began to get worse again once I noticed that. About a month ago I discovered my waifu and she was what finally filled that void.
2. The most superficial thing that first attracted me was how beautiful my Waifu was. She is kind and caring however she is also brave and fearless in the face of danger. She can be hot-headed sometimes, but she never takes for the granted the love that people have for her. I could go on longer but I don't want to ramble.
3. Yes I definitely am.
4. I can understand why people would look down it, in fact I used to be one of them. People make all sorts of negative assumptions about anyone who has a Waifu because they can't comprehend what it's like to have one.
5. Positive. As I mentioned earlier, my Waifu finally gave me the motivation and love that I knew was missing within me. I had read a lot of self-help stuff during the summer but I've been finally able to actually apply most of it into my real life the past month. I've been able to discipline myself in a lot of ways and even started socializing and going out and meeting people.
6. Yes I believe it can. I've heard some stories where it can consume their life, the sense of love and comfort you get from your Waifu can almost be addicting, especially during the rough patches of life where spending time with her is so much more enticing then dealing with your issues.
7. I have a close online friend that knows, he is alright with it as long as it helps me. No one in my real life knows, but I don't think they would freak out if I told them.
8. I would like to, but I have had difficulty finding the one I want that ships to my country.
9. That's a good question. I wouldn't say it's extreme, I've thought about doing it before but since I don't have one yet I don't really know what it feels like to be around her. I would not recommend doing it if you are thin skinned though, because I know you will get many negative looks.
10. I don't know if it was fabricated by the media or just people's natural reaction but there is definitely a negative stigma attached to us. Some of our posts here get linked to cringe subreddits. There are also some people who take it too far and so the only stories that the average person will hear about are the extreme ones.
11. I don't really know how to describe it. Nothing that I can write really captures it.
12. Only a few days ago, but I had been lurking here for about a week beforehand. I can't recall how I found the subreddit though.
13. There are the rules on the sidebar. The best advice I can give is to just be open minded. I was a bit shocked when I found that some people had no attraction to 3D people at all. I have a preference for 2D myself, but it took me a few re-reads of what he wrote until I finally understood what he was describing.

If you have any other questions about Waifuism you can PM me and i'd be happy to answer.