I'm a horrible friend 😩

I'm at my best friends house right now and I just want to leave her. She suffered an early miscarriage of twins last month and it's just so depressing. she leaves stuff out just so it does depress her such as baby stuff, her pg tests, maternity clothes ppl gave her, etc. She does this on purpose and I know it's hard. I'm trying to be supportive and there for her, but I can't.. I'm a horrible friend 😣πŸ˜₯ I was ttc for 3 months before this happened to her and she wasn't trying. But I now have put my ttc on hold because of this but I'm starting to feel suffocated by the depression. I want to move on with my life and be happy but I'm being sucked in.. I can't even be happy about my new nephew around her.