My friend Dave and I are both 29 and have known each other since we were in elementary school, we've lived together the past 3 years. We had discussed whether or not we'd be renewing for a 4th and I wasn't sure because it depended on if things were going well with my girl. He's not happy about it because he doesn't want to move, but worst case scenario he can move in with his grandfather. I got a girlfriend back in August and things have been going well between us so we both agreed I can move in with her instead of renewing my lease in mid February. I told Dave this in early December. Fast forward to yesterday, I'm prepping to move in with my girl and Dave has purchased a house that he'll be moving into in 2 weeks. I'm at work telling a coworker about it and she said I'd be only saving about 300 a month by moving into my girlfriends place that's nearly a 3th the size of the one I'm in now. Why don't I just keep the place I'm in now? So I call my girl and she'd prefer to go to my place since it's way bigger, then I call another friend of mine who needs a place to stay and hes down to move in to help with rent. It's a 4 bedroom townhome. So I bring this idea up to Dave and he flips out calling me a shitty friend and shitty adult with the timing of this plan. The way he sees it I gave him very little time to find a new place to live then changed everything at the last second when he was definitely moving out. Like I pulled strings in order to change out who my roommates are. After things got calmer he recognized that that isn't the case, I'm not pulling strings, I'm just going with the flow, hes not as mad but he's still definitely not happy. AITA?