Regulus shrugged a bit, looking unusually uncomfortable for a moment. "I socialized," he said carefully. Regulus had never made friends easily or well. Between who his brother was (or wasn't, depending on who you talked to), and who his family was, most people either had toadied to him, ignored him, or taunted him mercilessly. Friends really wasn't something Regulus had. It made him more then just a tad socially awkward even as an adult. Not to mention, keeping secrets made getting close to people impossible.
"Or you just luck out and keep getting bailed out by your Gryffindor friends," he pointed out. Regulus may not have wrote in the journal he'd purchased a few weeks ago, not yet, but he'd certainly been reading. It'd been an excellent source of information. Although how the Dark Lord was putting up with the idiots nearly advertising themselves in them was anyone's guess.
"Its in my vault, Sirius. Even you can't get in there, and I'm hardly going to hand it to him. I'm not stupid. Hurting him as hurting you. What do you THINK Dumbledore has him up to, honestly, Sirius? Just sitting back and letting you and his parents protect him for the rest of his life?"