My first threesome dating

When I was 25, my boyfriend who has been with me for three years and I decided that we should try something different to make our sex more exciting. Then we decided to try a throuple dating. At that time we didn't know the rule of threesome, I only knew the threesome scenario from the tinder for threesomes apps and sites. But there was a rule in my mind at the first place that I don't want to invite a close friend, or anyone we are familiar with. What if the threesome was a mess. So both of us agreed to find the third one on social media.