I don’t think being optimistic is being delusional or stupid. I don’t really care about labels. I look at it that no one gets out of this life alive. That’s all we have. Not going to have another life. If that’s all we have, might as well look for things to bring us joy. Not only tomorrow might never come as we get older there are fewer things we can do (health or physical abilities), so might as well do them.

Even if you have pessimistic view on life, you can still try to look for things to enjoy.

It also helps to not care what other people do or don’t do( I don’t mean not caring about people’s well beings). I don’t care about what kind of marriages people have or what they do in their free time or how they do their jobs. I don’t really have the time to worry. Especially if these people aren’t close friends or family. Just do what matters to you and don’t worry about others.