I’ve become very close friends with a girl I met about a year and a half ago. We’re both in our mid twenties. The past few months, she’s been in a deep depressive episode. There have been good days, but for the most part she’s been very depressed and distant. Sometimes she won’t respond to me for weeks at a time. Then we’ll talk on the phone and everything is normal again; we never miss a beat. 
Well, last week we had a misunderstanding and she got very mad at me and yelled at me on the phone. It was something small, and normally I feel it would’ve been easily resolved. However, she’s given me the silent for almost a week now over that. I’ve texted her but haven’t tried to call yet because I wanted to give her space, but it’s really upsetting to me to let an argument go unresolved. Should I try to call her or let her be and reach out when she’s ready? Any other advice on how I can best support my friend?