(Side?)Bridesmaid ideas

Hello, my girls! I just found out that I’m going to be proposed to in a month! While I’m keeping it a secret, I’ve already caught wedding fever and started browsing the internet for things I’ll need.

Here’s my question: I have 5 bridesmaids who are my close friends, and my boyfriend will most likely have 5 groomsmen who are close to him.

Out of those groomsmen, 3 have girlfriends.

The problem is, I’m already paying for the dresses for my girls and matching ties for the guys, but I’m not willing to buy dresses for 3 other girls I’m not even friends with, just because they’re dating some of the groomsmen.

However, I do want them to feel included. I was thinking of giving them something small, like a bracelet or another accessory that matches my bridesmaids, so they know they’re not bridesmaids but still feel like they’re part of the celebration.

Any ideas?