Welcome to the forum! I have been here for nine years and I rarely miss a day because this is a very civil and intelligent place (and you can't say that about most fan forums). Meet your fellow obsessives every day here! You picked the right show to get obsessive about.
As fauxindigo states, how did you become obsessed?
I'd be inclined to ask what you is obsessed about? Although if you said you was obsessed about why Black Thorn is such a good dorm I'd have to agree you as Black Thorn is such a good dorm.
I too watched as a kid. And a teen. And a twenty-something. and now a thirty-something. So, you could say I may be obsessed as well. Currently re-reading "The Lost Slayer" series. If you haven't yet read the Buffy novels, I would recommend reading them and that should continue your obsession.