I'm going to convince my boyfriend to go on a trip he doesn't particularly want
Why do you want to convince your boyfriend to go?
It sounds really fun. I'll be there with friends so it would be so much fun with all of us.
While you're a good girlfriend for wanting to share the experiences with him, you shouldn't force him to go if he really doesn't want to. He may not actually be happy about it and can bring down your trip if he does come along.
This is important to me, but I can see now why I can't take my boyfriend with me.
It's good that you are willing to consider your boyfriend's desires as much as your own.  I'm sure you'll have a great time on your trip, and you can tell him all about it when you get back.