I'm not going to attend the final ride out for a biking friend
Why don't you want to do that?
I'm scared I might get in an accident with that guy.
I understand that you're scared, but I'm sure your friend is really looking forward to you being there.
I feel I might be alone when riding in the pack, it can be dangerous.
I think you should really go you will probably have a good time. If you need to feel more safe can you try to wear neon yellow and use flashing reflectors?