I just flipped through Wood's X-Men and Generation X (which is criminally underrated btw) and I tend to agree with you.
I don't think you could call them girlfriends. This is my interpretation...
Wood's X-Men:
- Mercury punches Bling.
- Bling is crushing on Mercury hard; Mercury avoids Bling.
- During a mission Mercury saves Bling and they chat. Bling expresses her loneliness and feelings for Mercury. Mercury says she'll go out with her if she stops being a creep.
Gen X:
- Bling is a regular character.
- Mercury doesn't show up till the last few issues (of a too short series).
- Mercury teases Bling saying "You can say that you missed me."
- They don't even stand next to each other on the final goodbye page BBQ.
Honestly... I can read this as Mercury being straight, bi, etc. This is actually a bit similar to Iceman/Northstar back in the day to a degree. You can feel the intent there but its sooooooooo vague.
That said, I have updated the list to include Jumbo Carnation, Madin (Morlock from Sina Grace's Iceman series), and Mercury.