Long hair-chan is pretty clearly letting that door open IMO. Lets hope the other girl will catch a clue at some point down the road !
I wouldn't call that "clearly letting that door open". I've met and seen plenty of straight girls joking about marrying/kissing other girls if they're single forever, and some of them are even super touchy-feely, but they're 10000% straight in the end.
Drunk straight girls are TERRIFYING!!! (My PTSD talking)