Did I made a mistake by not specifying?

So I met someone like 2 years ago and we talked sometimes but not that much during those talks. Turns out recently we talked a bit more and I asked her if she wanted to go to eat at a certain place and she said sure. Now we haven’t flirt or anything. She recently had a break up and I did this just as friends, didnt tell her anything about friends. But do I have to be specific? we dont even text or talk that much

is it a must to always be specific when going out even if just friendship?

TLDR: Basically I met someone a long time ago, I told her to meet up by just to hang out as friends. Do I always have to specify?