Things end.
Not just life itself, which is tragic enough and can be hard to deal with. But parts of your life come to an end. Your childhood, your relationships, and in some ways your school life ends as well. All of these things can't go on forever much as we might want them to. We can try to deny them or delay them in some ways, but no matter how hard we try, they will eventually end. When it happens, the only thing you can do is try to learn how to deal with the fact of the ending. Mainly because you don't really have any choice in the matter. Although it can be comforting to try and keep them going, it's usually better to get through them and get to the other side.
Doing so has more benefits than you might think. It's hard to see that when you're facing down the ending of something. For some people, that ending can be like a kind of death, even if not in the literal sense. Coming to the end of a thing can be emotional and scary. Especially when you have a plan for how things are supposed to go afterwards and you find out that the people around you might not share your idea of what comes next. In many ways, the comfort of knowing that some things won't end even if the circumstances which brought them about are. The most obvious example of this is high school. It's a major transition, but if you're lucky you have friends who you can bring forward into the life that comes after. Whether it's college or a job or whatever else you have planned. School might be ending but your friendships won't.
At least that's the idea anyway. But even that can be a form of ending. Your friends might be going with you but the thing that made you friends, namely the fact that you went to the same place at the same time every day for so long comes to an end. The thing which kept you close is no longer available to you. That makes it harder to keep them together. You might end up losing them too if you're not careful.
Dude is fundamentally about how to deal with the ending of things. Lily, as played by Lucy Hale, and her friends are coming to the end of their high school experience. As a result, they are dealing with a lot of stress and uncertainty around what comes next. Lily in particular wants to keep things together and to bring her friendships with her beyond this ending. Some of her friends aren't necessarily so sure. They have other ideas about what their lives are going to be like and what their relationship will look like after high school. It adds a whole other layer to the fact that their life as they knew it is coming to an end.
It's fascinating to watch them go through it and you should definitely take the time to explore the ending of things.
Check out Dude on Netflix.