It's stumbling because the other person is a thin-skinned, weak-spirited person. Perhaps the other person is jealous. I never understood the whole stumbling aspect. Seeing the actions of others, then doing research that confirms your thoughts of those actions is one thing. But just seeing someone do something (talk to a girl, drink too much, etc) on its own should not stumble someone. I think the elders just need to tell the person to grow up.
The worst that could happen is you and her really hit it off, she stops studying, you pursue her and if anything does happen get DF'd. If she does get baptized there is no guarantee that you two would be together. I would tell her to run away, but that could have bad consequences for you. It's a judgement call only you can make.
Sucks to be a mid-20s+ single brother in the org. Decent eligible females in that age group are few and far between.