SUBREDDIT: r/relationships
TITLE: Me [23 M] having problems talking about intimate stuff
POST: Hey Reddit,

every time I talk to somebody - friend, family or someone I connected with while traveling - about something intimate I've been feeling or thinking about, I tend to get sad and depressed. I get the feeling that I'm being weak and although it is good to tell somebody my deepest thoughts, it is unpleasant. For example I just met with one of my best friends, a girl I've known for years now and have a really good relationship with, about what we would like to change about ourselves. It was good to talk about this in a way but all the same I got a lump in my throat and felt depressed. This feeling is accompanied with a sense of behaving kind of weak and just a pinch of remorse telling the other person in general. I have the feeling the other person would think higher of me, if I wouldn't have told them.

I want to know what this reaction may stem from and how I can work around it, since it makes connecting to other people in a more intimate way exhausting.
TL;DR: 
When I'm talking about intimate thoughts or feelings I get sad and slightly depressed. Why is this so and how can I fix it?