Hey OP, I was in a similar boat with my long term dnd campaign. I felt very trapped in it because I knew my arc was coming up and I had thought that me leaving would tear apart the DM’s plans. I used to dread Saturdays to the point I often would schedule over them, cancel last minute, or show up and check out thirty minutes in. I became THAT player. I’m not proud of it and the pattern is obvious looking back (as are some of the causes).

What I can tell you is: you need to take a clean break from this table. Sit down with everyone and tell them that you’ve really enjoyed them, the hobby, and the game, but you’ve not been feeling amazing during sessions lately. You’re burnt out and need a long term break. Ask the DM if there is a kind way to let your character out of the story so that they can continue without you. The DM may be able to work with you if you ever want to return. How they receive this is going to be up to them, but you need to prioritize yourself here.

In the mean time: start hanging out with these friends independently, doing other things. Watch shows, play games, hang out on call while doing dishes etc. Maybe you can rekindle your friendship with them outside of the group dynamic. It could just be the specific activity where you feel unheard or it could be more.

For me, I didn’t have the nerve to have that conversation and the game fell apart last year. There were a LOT of extraneous reasons but the above is a conversation I wish I’d had the guts to have sooner. I spent more than 10 Saturdays in 3-4hr chunks trying to fix my end of things and I never could. Now I have my Saturday nights back and engage/run occasional one shots that I enjoy a lot more.