Just For One Night

My friend is a few years older than me, and is gay, When we first met, he tried it with me and I knocked him back. We're still friends now and meant to be meeting in a few weeks.
Recently I've been thinking of going down the bi route and I've started to find this friend pretty sexy.

When we're out in a few weeks, I'm tempted to make a move on him and see. what do we think? will it ruin the friendship or be a great night haha?
I also think he's a top and I don't know if I'm ready for that lol