Help. I'm an idiot.

Okay. So story time.

About 6 years ago I met this guy, A. He and I got super close. We were teenagers. We almost dated. Kissed a few times. Anyway. He introduced me to his buddy, L. That was a year later. L and I became close too. But not in the sane way. A broke my heart a lot. He dropped off the map like 2 years ago. L and I continue to be super close. He's gotten me through rough times, defended me against my abusive stalker ex and offered to drive 5 hours because he thought I was in trouble, to name a few things. Anyway , he had been a hell of a friend. I care so much for him.

I recently came to terms that I'm falling on love with him. I met him 5 years ago. He's my absolute best friend. I adore him. I should go for it right?

One problem...he's gay. He came out to me first because he trusts me. This was 6 months ago. But he thought he was bi for a long while. I didn't really realize that I was falling for him. I had glimpses over the years and thoughts but never gave those the time of day. But lately, I haven't been able to ignore it.

What do I do?