Unsure Advice

I am supposed to go on a camping trip with my two friends and my ex boyfriend in a few weeks. A while ago we agreed to be friends, but now I don’t know what’s going to happen. I cant keep hurting myself believing that we’re soulmates when he doesn’t feel the same. I really really wanted to go on this trip, I’ve been looking forward to it for months. I just don’t know what to do. Pls let me know