Why do people change in relationships?

Once you get to know someone better, you find they get complacent and feel they don't have to make so much effort...

I would give this one the silent treatment for a couple of weeks. Let him wonder. AND instead of fixating on a guy who treats you like you don't matter, find something more fun to do.

The challenge has gone or something like that. I was pestered into dating a guy then he treated me like a big nothing.

There is a certain time when a relationship comes to a point of not being too needy to one another. Or this relationship has found its breathing space to complement your individuality. It does keep a relationship healthy.

At such point, some things are important and others are not that necessary.

If he calls after midnight just have your phone on silent and don't answer the phone if you don't want to talk to him.

If he can't call before midnight it's his fault if you don't speak to him after midnight.

Take expectations out of the equation and all you got is two people with different schedules.

It happens with everyone, c'est la vie

he changed his mind

https://similarworlds.com/30-Miscellaneous/3137642-Theyre-all-like-I-will-do-this-and-that-for-you

hope he’s an ex

You can't wear the same clothes every day. People have to change!

Do you have something to talk about? If he had something to tell you he would absolutely call you each midnight, so make sure that you do not only engage in shallow small talk, but also funny conversations that he will want to get back to as soon as possible. If he doesnt bite on quality time, then he's just a boring dude.

We get comfortable, complacent, and selfish