Im not entirely sure if I am overreacting about this, but a few weeks ago my boyfriend 'allegedly' completed a full marathon in a very impressive time (sub 4). Since we met six months ago we have discussed this regularly, I have watched him train, helped him fundraise and supported him emotionally up until the big day. On the day off, I was unable to watch him in person due to reasons out of my control, so instead I asked him for his bib number so I would be able to track online and my parents went to support him in person.
On the day, I logged on to track him to see how he was getting on about an hour into the race, only to discover that his name had not been registered. Initially I thought that this was because he was potentially registered under the name of the charity he was running for and instead I decided to track him via his find my iPhone. As he went through I continued to send screenshots to my parents of his location so they would know roughly when to expect him. I continued to check every half an hour and eventually noticed that about 2/3 of the way into the route he had stopped at the hq of the charity he was running for, his location remained there for 45 minutes, he then sent me a photo of him with a medal, claiming he had just completed the marathon.
I called my parents to say he had finished and asked them if they had seen him cross the finish line, where they were standing and they said no. At the same time, I messaged boyfriend to ask if he had seen them and he claimed it had been so busy that he hadn't noticed and to just tell my mum and dad to go home. At this stage I started to wonder if potentially he had pulled out of marathon half way through and didn't want to talk about it just yet.
After some further investigation, I now know that he did not run the full marathon, instead he ran with a five person relay group, who each did a 5th of the route. I have not confronted him about this yet, but I have been really distressed by how blatant of a lie this is, he continues to claim that he completed the full 26.2 miles and I keep thinking back to how he lied to my parents and friends faces, most of whom donated towards him "running a marathon". This isn't the first time he has lied to me, typically they have been small white lies about insignificant things but this feels huge.
Its been weeks and I still haven't yet brought up the fact that I know that he lied, mainly because I know he will likely just double down. I can't help but wonder if he is lying about this, what else could be going on. I feel utterly betrayed and I don't know how to deal with this situation. Is it worth continuing a relationship with someone who can clearly lie so easily?