My girlfriend and I have been together for three and a half years, and we've finally hit a bad spot. She's been angry or quick to snap at me in the last few months, which is nothing like her. I wish I knew how she felt so I could better understand her, as I don't have depression or anxiety, and I don't know what she goes through.

I feel like I've failed her and let her down because I used to be able to make her feel better. Now, it's like everything I do just upsets her. She told me she's been feeling numb to everything and everyone but still loves me and wants to be with me. However, we're taking some time away from each other, and if that doesn't help, we might have to break up. She says she feels toxic, rude, and mean to me all the time and doesn't want to treat me that way anymore, but she can't stop it, and it upsets her. I just don't understand what could've happened for everything to go so wrong. I know about the honeymoon stage and all, but we were golden way after that, and we were inseparable. Now, it's like I've lost my world and my best friend.

Does anyone have good advice from personal experiences?