I need advice on how to confess my feslings (read below for context)?

I met this girl during my Gap year in another country. We became friends and I did develop a crush on her. She had a boyfriend, so I never really acted on my feelings. I'm back in my home country, and we've definitely become closer since being back. We call once a week and message back and forth. She recently broke up with her boyfriend and I want to tell her how I feel. I'm just worried I'm gonna screw it all up. She calls me her best friend, and while she does say things to me that I feel come across as something you wouldn't just say to a friend, I'm just not sure how to approach this. Any advice would be appreciated ๐Ÿ™

I need advice on how to confess my feslings (read below for context)?
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