I've been seeing a new psychologist and she said this at our last appointment.

I was telling her that I cry at the drop of a hat, and I seem to overreact to certain situations, especially if I sense or feel like I am being rejected or overlooked.

She said that all my feelings are valid. Their intensity might be 'disproportionate' to the situation, but that's totally okay. Some people feel more deeply than others. 

It's how I *react* to my emotions that makes the difference, and where the skills I learnt through mindfulness and DBT come in. Also, if I feel rejected, do I check the facts? Or do I just blindly accept the emotion as the complete truth?

This session was very validating as I've always been told how I overreact, am too sensitive, and so forth. Perhaps this could be just as validating for you.