Former Big Brother houseguests Derek Xiao and Claire Rehfuss have officially called it quits. "Hi everyone, after four wonderful years together, Derek and I have decided to end our relationship," Claire, 29, wrote via her Instagram Stories on Saturday, September 20. "Nothing dramatic happened, just the realization that we're different people who want different things." She added, "We still care deeply about each other [and] are grateful for the time we shared and will remain friends. Thank you for all the love and support, it truly means so much.