Pre war Bucky was a gay icon who protected closeted lesbians by picking them up for dates to avoid their parents suspicion and then taking them to hang out with their girlfriends (but staying close enough that he could punch the daylights out of any fucko who tried to harass them). This is canon.
James Buchanan Barnes on his last night before deployment, chaperoning two lesbian nerds on their date to the science fair.
Bucky could have just told Steve the real reason the girls were never into him, he’d have been cool with it.
I guess he just kept saying “double date” and hoping Steve would get the damn hint already.