My girlfriend is depressed and is "avoidant attachment style". Hates her job. I don't know what to do

So my girlfriend (F25) and I (M22) have been together for nearly 6 months at this point. About 2 months into our relationship she started at a new job that she was very excited for, but she's gradually started to hate it, and the past few months have been living hell for her day to day. She isn't clinically diagnosed with depression, but I'd say (as someone who has experienced depression in the past) that for the past 1-2 months she's been very depressed.

Her avoidant attachment style makes it nearly impossible for me to do anything. We don't live together currently, and lately it's almost like I have to fight to be able to see her. I can't even help her or console her. She told me straight up that when I give her sympathy or offer to help (even just listening to her or talking to her about it) she gets angry and impatient with me. Basically when she's sad, she becomes silent, distant, and angry. This leaves me sitting at home on my own (I live on my own) missing her and feeling horrible about how she's feeling and I can't even talk to her or see her or anything. It really, really sucks.

Now, of course her situation is considerably tougher than mine, and I don't want to make this problem about myself too much, but it's really started to weigh on me. I love her to bits, but I'm becoming miserable too. My life is honestly pretty good, I'm pretty lucky with my job and whatnot, and things between us are amazing when she's happy, but right now I just feel so stuck and lost and down and I don't know what to do.

My question: to people who have dated someone with "avoidant attachment style", how have you been able to cope or help your partner when they're down? I'm starting to feel like I can't handle it for too much longer, but at the same time I still love her and don't want the relationship to end over this.