I'm fat guy, how big is it a problem for marraige?

Don't worry about finding a "beautiful wife" when you find the one you are meant to be with she will be the most gorgeous woman you have ever laid eyes on no matter what others may see/think. When you love someone it is not just looks that make them attractive. The fact that you are making an effort to become healthier is good and women will like that because we want healthy not necessarily ripped. I like my men with a little meat on their bones. There is someone out there for everyone and you will most likely find her when you are not looking :)