I've had a FWB situation for a month or so.
The guy has told me on four separate occasions, only when drunk (like he's out drinking with friends and messages me, etc), that he wants more than FWB and wants us to date, basically. I'd been in a (fairly shitty) relationship up until 3 months ago- after the break up he told me he'd liked me for a long time, since we'd met basically, but obviously couldn't do anything. I liked him too toward the end. And I agree it feels as if there's something between us.
Anyway it happened again a few nights ago, and he explicitly said he wanted us to talk about it properly when sober - except when I tried to, and he blanked the conversation and didn't speak to me for the rest of the day, or the next morning like he normally would 
so it seems as if he doesn't actually want more at all, which has pissed me off, because I started to let myself think about the possibilities of dating and now I feel a bit hurt by it. Which is so frustrating because I genuinely was okay with just sex until he (repeatedly!) brought feelings into the mix. I don't know what to do - I don't want to stop seeing him but I feel like things are going to get complicated really soon. Do I just sit him down when I next see him and ask him to be honest about what he actually wants from me?!