To preface: my boyfriend "Alex" and I were first together a few years ago and during this time, I have met the bride, Sarah. Alex and I had broken up for a few years but have since gotten back together. By the time this wedding happens, we'll be back together for about 1 1/2 years and potentially moving together soon-after.
So my Alex's best friend, "Mark", is really good friends with Sarah, whose wedding is in March. Sarah asked Mark if she should invite Alex to her wedding and Mark said yes. Alex and Sarah have met a few times and are friends
This wedding is going on a few states over from us, so it would be a trip for my boyfriend to get there.
The STDs have been sent out and when my boyfriend received it, it did not come with a 'plus one'/guest.
I casually asked my boyfriend about it and he said 'it's probably because she hasn't met you many times, and it's already going to be about a 400-500 person wedding so she probably wouldn't be able to invite you.