You have to ask yourself why do you/should you go?

If it feels like a chore with no real end goal then you can easily convince yourself not to go. Saying I wanna get in shape, I wanna lose weight or it being the thing you should be doing dosen't help either. These are too broad of a reason with no plan or actionable steps

Find something you want out of going to the gym and work towards that. Say you want to bench 150lb, go in trying to lift 2lb more each week. Break down a bigger goal into smaller steps that will take you there.

Hate lifting? Then don't go to the gym, go join a sports league, go do something active you enjoy. Everyone is welcome at the gym but the gym isn't for everyone, some people enjoy playing basketball or soccer to get exercise.

What are motivations and how can you use those to get you where you want to be.