You know what's worse than 3rd wheeling? 4TH WHEELING. I am Polyamorous and last year I had a polyamorous boyfriend and a girlfriend, and we were all involved in one relationship. So, my best friend came along with us to the mall, and she instantly regretted it because we were being lovey-dovey dorks and eating each other's food, buying each other presents, and kissing a lot. She ranted to me at 3 am after that because she felt so awkward, but refused to leave.
I felt bad. She got scarred after she saw my boyfriend and girlfriend making out when we got out of the bathroom together