Honestly, if she's just a FWB why does it bother you?
Think about it, the guy who sent the flowers is the moron. Why? Well, for one he's probably hung up on this girl. Secondly, you've already f'ed her so why are you mad? Thirdly, say she does take him back - you'll probably stay FWB's with her while she's with the ex.
Think about it, the guy who sent the flowers is the moron. Why? Well, for one he's probably hung up on this girl. Secondly, you've already f'ed her so why are you mad? Thirdly, say she does take him back - you'll probably stay FWB's with her while she's with the ex.