The problem is simply the age disparity. Matthew, my brother, is 27, and Steve is 29 (with two children, and a girlfriend with one). Had I known them (especially Steve) when they were my age, they'd have run me ragged, but it's been a long time since then and they've both mellowed out considerably--to the point even as easy-going and introverted as I am, I feel the need to get out and do something somewhat more often than they do.
Which isn't necessarily a bad thing. It makes for great roommates. However, given the 5+ year disparity between myself, them and everyone they know (and, consequently, virtually everyone I meet as a result of living with them), my current situation simply doesn't lend itself well to making contacts among those of my own generation.
Gods I can't wait for school to start again. Just eleven more days (technically ten, but I have a personal system wherein the previous day doesn't end until I've gone to bed or the sun has risen).