Hey dude, I feel ya. I am not overly over weight but I drink alot of coke and eat chippies like they are going out of fasion... I am 6 foot tall and weigh 110 KG's so I do have a bit of a gut. I joinned a gym a few months ago but stopped going because I finished my course and my free bus is no longer free so I havn't bothered to go which is my own fault... 45 minute walk into town to goto the gym is a rather long walk.
Ahhh, I see you meantioned Soul Calibur IV... I used to be 3rd on the leaderboard at the arcade in my city for Soul Calibur 3... Those were the days!
Also, my brother has Asperger's Syndrome so I can understand what you are going through... I don't FULLY understand it but I am starting to. Being social in the real world can be tough, I know because I used to be a introvert and then I got a job working at a big internet cafe and then started to talk more and more as time went on and now I don't mind speaking my mind or talking to people I know or do not know. The more you do it, the easier it will become.
By the looks of things this forum is going to turn out pretty good, so hang around and ask questions, post topics, don't be too shy and be friendly. In time you will get the answers you seek.
A wise man once said "Seek and you will find... Knock and the door will be open for you"
Peace.