I think it's probably because of their goals. They might have thought,"I'll ask her out when this is all done."And maybe because they thought love can be a distraction to their work.Or maybe the boys have so much pride they think they're just gonna end up being dumped.Well, it wouldn't hurt to try right? How about u guys? What do u think? Now I wish Arakawa-san is reading this. She doesn't know how many people would like to see Ed and Winry of Roy and Riza kiss.I wish there was a psychologist in the series,so that way Winry of Riza won't have a hard time thinking,"What do men want from women?" of Roy of Edward would think,"How am I supposed to impress her?"