Normally, people here will tell you to share with your friend the word about bitcoin and this forum. However, if you're not feeling safe or okay with this, why would you want to pressure yourself, then?
Even those who preach the sharing thing with friends are also advocates of privacy and advise that we shouldn't let our data out. It's really conflicting when you want to juxtapose all that.
If I were in your situation, I'd deflect the insistence with some vague words like "I'm working as a freelancer for a client overseas" or something along those lines.
This is even worse because it gives out the vibe that you earn in foreign currency. In my country, that's interpreted as one being able to afford three square meals and foot one's bills. Those who know this will beam searchlight on one and the level of dependency on one is likely to increase.
Money burns bridges, and I assure you, if you do not share what you really do with that person, you'll be a goner to her especially since you offered her to show what it is and you're going to back out the last second.
OP has whetted the friend's appetite, they should do the needful. You can't leave a friend in the lurch, especially in a bitting economy once they've shown interest. However, OP should endeavour to tell the friend the challenges and consequences of what this forum drags along too. It's not all that rosy. There are consequences for defaulters.