I lost my virginity to what became a FWB a few months back. We're living together at university and will be living together in a house next year too.

After a few months she decided to break it off (she said she didn't want to get "too attached"). Now she's fucking other guys. She has a new fuck buddy who comes over every night and I can hear her giggling and moaning from my room. It lasts for hours each night.

What should I do?