Whatever the situation, your emotions towards it are not an “overreaction”. Similarly, your emotions are not an “under”reaction. Whatever you are feeling, it makes sense. Maybe something hits you harder than you’ve seen it hit others. Doesn’t matter. Your nervous system is your nervous system. Some of us are ticklish AF, some of us are not at all. Similarly, some of us feel emotions really strongly, some of us do not. Either way, your emotional response makes sense and you deserve to feel every single ounce of it.
And if someone says you are “too much”, let this only show you that they are not someone whose support you can rely on. It means nothing about your worth, the validity of your feelings, or you as a human being. It is a reflection of what that person is capable of (and if you are that person: it’s also ok to have limitations), and of the way your two needs & personalities mesh. It is not a reflection of you being intrinsically TOO anything.
You do not have to suffer guilt for feeling deeply, or for not feeling much at all.