I think I’m in love with my best friend but I have a problem

I (19m) think I’ve fallen in love with my best friend (19f). I’ve struggled with my mental health for a while now and just recently have started to feel happy and she’s been with me through all of it. At the beginning of this summer I partied with some friends and long story short I ended up calling her but I don’t remember what I said but I think I told her I liked her. The next day one of my friends was really vague about what had happened that night but from what he told me, all he said is that someone told him about their crush, and then he was about to spill the beans about someone liking me, but then said it wasn’t his place to tell me ( I didn’t put two and two together, I know I’m oblivious smh). Then a couple months ago she and I were talking about relationships and out of nowhere she said that she believed that a friendship could evolve into dating (again I know I’m dumb). Then on Halloween she started taking to everyone about how I would be a great boyfriend (another instance of me being a complete idiot). But she did get me thinking and I realized she’s been saying she likes me but now I’m in this weird predicament where we’re both going into adulthood and each of us knows what we want for ourselves in the next year, she’s staying in town for school and I’m moving 3 hours away for school(this wouldn’t be till the beginning of the next school year for the both of us). I really do think we’d be a great couple because we both know so much about each other and we just click. She’s also been there for me when times were tough for me and I love her for that, but with us each knowing what we wanna do and the eventual distance for us I’m just not sure, I guess I just need some advice.