Help! I'm falling in love with the same girl AGAIN. What do I do?

Okay so for some context (get your popcorn): We are both 18 and have been friends since childhood. I was deeply in love with her for a solid two years (from the ages of 14-16), but at that time I thought it was unrequited. We were best friends and extremely close- always cuddling, text-flirting late at night (things that I now realize regular best friend do not do). It was complete agony- she was the first girl I was fully in love with and I never confessed because I was convinced she would never like me back. She then got into a relationship with a guy (she's pan) and I was devestated. I managed to get over her- or so I thought. Fast foward to a few months ago, she had freshly broken up with that boyfriend and we got super drunk at a party and both admitted to being in love with each other a few years ago, which was a crazy realization for the both of us to know our love was actually requited. We didn't see eachother for a while after that, but recently we've been spending a lot of time together again and I keep trying to push the feelings away but I fear that I may be falling for her yet again. I honestly don't know what to do. I know I don't want to bottle my feelings up and make myself suffer like I did last time. Maybe I should just confess to her? I don't know. It's kind of crazy that I'm falling for my first love again. And the fact that last time around she did actually love me back gives me some hope her feelings for me could rekindle once again. What do you think I should do?