I can't help but to feel bad for being sad
Is there something wrong with feeling sad?
I think life involves more than what I'm currently experiencing.
There are many things going on in the world but it is okay to have feelings. It is better to accept how you are feeling and deal with those feelings to help you develop as a person.
Maybe I'm just not that happy.
Sometimes temporary denial is a good thing to try and compose yourself and prepare for what's to come. But it's really normal to feel sad! How about trying to talk out your problems to let out all the burden?