Am I wrong for switching my seat for my flight
Context: Me and my 5 other friends (17-18m) are going on a summer grad trip. On our flight, we signed up for our seats so that there are 3 pairs who sit next to each other on the flight, ie: 43a, 43b. However, my parents told me that I would be able to upgrade my seat from economy to first class for free using their miles. They said they will never use the miles and just said that upgrading was an option. I asked my other friend who isn’t flying before hand if I would be wrong to upgrade, he said no and that he would do it. I upgraded and told my seat partner. I think he’s angry at me now because he isn’t talking to me and doesn’t respond to my messages. Am I wrong? I feel like anyone would take that deal. Additionally, this is only for the flight up, I will sit with him on the flight back.
What do you guys think?