The End of Our Romance?

I’ve been in a long-term relationship with my girlfriend, Sarah. We both turned 25 last year and have been together since we were freshmen in college. It’s always felt like this was the real deal, deep emotional connection, the occasional trip to the “next level” when things heated up, but mostly platonic and cuddly. She moved into my apartment a few months ago, and it had become more serious than ever. But lately, I’ve noticed she’s been really cold towards me. No longer seeking out physical intimacy or even eye contact during conversations. The last straw was when we both came home late from separate events, Sarah went to some networking thing at her office, and I just met up with friends for drinks. We were in a foul mood, but there was no spark between us. After some silence that stretched into uncomfortable territory, she finally said it: “I think we need to break up.” I tried to argue, saying that the spark is still there but dormant and needs nurturing. She countered with her own words, things had been building up for a while now, that this wasn’t just about us being tired or stressed out after long days at work. The truth hit me like a ton of bricks; she felt it too. We decided to take a break, seeing other people and spending time separately before deciding whether we want to commit again. It’s been two weeks now, and every night feels like the longest day of my life. I still love her deeply, but the thought of losing her is crushing me. What if this really is the end?