I have a lot of pent-up emotions that may be too mature for 13 year-old.
Why do you have so much built of emotion?
It's just how I feel. It may be childish, but it's how I feel now.
Letting emotions pile up can be quite difficult and take a toll on your well being. You should consider speaking to someone so what you are feeling is not so daunting.
I don't think so. Maybe later.
If you continue to let your emotions pile up, then you may become overwhelmed at an inopportune time. Instead, reach out to someone and talk before everything becomes too overwhelming.