One more important point:
Any serious relationship means compromise. Some big, some small. You are not going to always get your way. You are going to change and ideally you are going to want that change.
If you look for a relationship thinking that your life is perfect as is and you're "not going to change for anyone!" you are going to die alone. It doesn't matter if your hobby is videogaming or body building.
Girls don't just want you; they want you in a relationship. If you are not willing to commit to anything larger than yourself, women will know and they will not want anything to do with you. They will know.
I really can't emphasize this enough, especially the bolded last part there. Aside from the lazy, chubby, smartass yet somehow a human avatar of doubt thing I've got going on, the essential reason I'm perpetually single is that I honestly have no interest in compromising myself for anyone. I'm essentially Stalin in a relationship- I don't give a fuck how many people have to die, I'm getting my way. Which is why I've kind of stopped looking for a mate. Either I'll change or I'll die alone, and honestly I'm fine with either.
Yeah, I mean, if you understand that - and accept that - that is totally cool! I have single friends who have decided they are going to
go their own way for the rest of their earthbound lives, and that is fine. But Forever Alone on your own terms is very different from Forever Alone and you don't know why.
Now to talk you down off that ledge, at the risk of repeating AA clichés: "one day at a time." You get to know someone before you date them. You date someone casually before you date them seriously. You date someone seriously before you date them long-term. You date someone long-term before you get engaged, married, start a family, etc. etc. Every step is built upon the ones before it, and you shouldn't be worrying about about Stage 8-4 when you can't even beat 1-3 yet. So to speak.
spoiler (click to show/hide)
One more thing: most sensible girls will allow you your own space and your own hobbies, including (non-creepy) games or anime. It just can't be all encompassing, and when they "give you your space", that means you keep it in your space and don't insist on telling them all about the latest plot twists of Dragon Age II. That usually goes over about as well as a cat dropping a dead bird on your doorstep. Keep your hobbies - but keep them
hobbies.