SUBREDDIT: r/relationships
TITLE: Me [22 M] with my SO [22 F] 7 mo, I'm ruining it..
POST: Hey all.

Been together 7 months. Lately I've been managing to fuck up about once a week in some way that is hurting her, and I absolutely hate it. I just don't know how to stop bringing up things that bother me a bit. The problem is when I do I manage to completely fuck up what I'm saying and say things that make her feel unloved, unwanted, unappreciated... Basically everything horrible that I never want to make her feel.

This relationship is the best thing that's ever happened to me and I feel like I'm completely ruining it. How do I express myself without making her feel these things?
TL;DR: 
I keep saying things that hurt her or make her feel horrible and it needs to stop. How do I express myself without making her feel these things?.