I'm not sure what to do?

I matched with a girl on a dating app a little over a year ago. We got along great but she decided to just be friends. Then sometime after she got a boyfriend. Then recently she got a new job and was wondering if I could help her with it (she interviews me about finances). She invited me to go eat after the interview, then she invited me a 2nd time for coffee and return some papers to her. But just before the 2nd time her boyfriend asked her to ask me if she was single, would I go for her? I told her no I wouldn't, but I would (I said no because I didn't want to make things awkward). The guy sounds like he is threatened and I don't want to cause any trouble.

⛔NOW THE QUESTION⛔ Should I tell her how I feel and give them space? Or should I just leave things alone? I still have feelings for her but I don't want to ruin the friendship. Thanks for reading.
Im not sure what to do?
I'm not sure what to do?
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