It sounds like you are frustrated at the way you react sometimes, but it also sounds like you’ve been carrying some burdens. I’m sorry you feel this way, it must be really difficult. I have struggled too with reactivity but less so with crying and more with anger.
The key for me in CBT and DBT was learning that just because I am triggered or I feel a certain way, doesn’t mean I have to act on it. I have the power to choose how I react. This is the hardest part though as my usual and learned reaction is to just “ragequit” as they say. I use a trigger plan. I know what my triggers are, I’m slowly learning to notice when my triggers arise, and have a plan i.e okay my trigger is _____, so when I feel triggered, I’m going to step outside and have 1 minute of fresh air. It’s very very difficult but it gets easier with time. I’m not a psychologist but this is what I learned from them.
I do find that people who are usually highly sensitive are also highly empathetic. I recently watched someone anecdotally talking about cognitive reprocessing, and how for whatever behaviour we have, there’s usually a positive alternative or at least good intention. For example, I have OCD tendencies which admittedly sometimes get out of control, but the good I can acknowledge that comes from it is I’m always prepared for a crisis, I value hygiene (always a plus!) and others can trust my house is very clean.
It may be true that you are very sensitive. Some people just are, and some people have been through horrible things. But there will be positive sides to this. Do go gently.
-GraceUponGrace x