I think it depends on the circumstances and who is saying it. I'm wondering if someone in RL who is interested in a person would say it in those words, "you have so many good qualities about you". It sounds more like something a teacher would say, not a peer. What was the context of the remark?

I would suggest asking the person out anyway. My mother used to say "nothing ventured, nothing gained." If you don't take a risk, you could lose out on a new adventure, or a new relationship. Good luck!