I and my bestie have a crush on you

We are back from normal. We clashed into each other along while back in the day. He had my back all the time, he was my math buddy and my best friend. Then he ... left, he went to a different school and I never saw him again. I didn't like him, being youthful of course and I never would have...Time moved on and so did old friends, I was off to Junior high...and then i saw him again. years went by and i liked another... but grade 9 peared around the corner and there we were. Same homeroom, same old people. She likes you and I like you too and you know this very secret but...Shes my best friend and i guess you just don't like me, which is totally fine because.... I got to put an act so my best friend will stay my best friend. Its very simple indeed.
What am I supposed to do? Act and act and keep on acting? That act did not work though. You and I keep staring at each other but... We are going different directions? So We can't? ....