This girl I talk to frequently sometimes mentions my crush on her and jokes about it. How can I tell if she's dropping hints or just a good friend?

Kevsker

So this girl and I were classmates during highschool. We were both mature for our age and we had a love-hate-relationship (we annoyed each other a lot but were still very close).

We both moved to different countries to study, and we speak regularly via whatsapp. We send memes or news articles and generally have a good laugh. We also discuss more serious and private stuff like relationships. I jokingly admitted to her once that a rose she received on Valentine's day during highschool was mine. She acted very polite and found it cute. She was also wondering why (back then) I never told her about my crush, because "who knows if it could have led to something".

We had a facetime reunion with some close classmates recently. This is how it went:

We had a moment to talk privately because the others were late. She was ecstatic to talk to me in person. She mentioned how I had become much more mature since our last talk and told me that her 3-year relationship with her boyfriend wasn't going well and that it would probably end soon. She said she was worried that after her relationship ends, she might not find someone who would want to settle down with her, or marry her. I acted polite and assured her that there will always be someone to settle down with, so she shouldn't worry. She then brought up my crush on her and told me that if I ever was to marry, I had to invite her to the wedding. This is when her closest friend (who just joined) jokingly told her: "Who knows, maybe you will be the lucky one". In a moment of shyness I replied: "Haha, she'd wish". We laughed a bit and then continued with other topics as our other friends started joining in.

So that's the entire situation. She always seems very interested in me and my life, and sometimes teases me about my crush on her. We often talk about relationships, so how can I tell if she's just being polite/curious or if she's trying to hint at me that she's interested? If so, what is the best next step?

This girl I talk to frequently sometimes mentions my crush on her and jokes about it. How can I tell if she's dropping hints or just a good friend?
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