I feel like the problems I have don't matter so I bottle them up inside.
Do you really mean that? Why do you feel like your problems don't matter?
I feel like my pain is minuscule compared to other people's.
I can understand where you're coming from but bottling things up like that is just going to make them compound and get worse. Your problems are as important as you feel they are and comparing them to someone else problems isn't going to help. Don't diminish your concerns just because it doesn't seem like a big deal to someone else.
There are kids out there dying and starving, I really have nothing to complain about.
Even still, that doesn't mean your problems aren't real as well. You aren't of lesser worth just because there are bigger problems in the world.