She lost interest through stress, how do I win her back?

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Ok so i've been seeing this girl from work for a year now and about 3 months ago we decided to become more serious and date. For the last year or so we got along, became very close and open with eachother, loved eachothers company and cared for eachothers wellbeing, its been great!

6 weeks back work got a lot busier for the summer and we were understaffed and she has had to deal with longer shifts and more days and she's struggled to the point she even cried. Both of us work 5 days now but they tend to be different days, so we can't really hang out and from her stress she went distant on me. the more i tried make her feel better the further and more hostile she would go. I asked about it and she said it was just the stress and she kept distant because of the stress and on days off she was just too upset or exhausted to make the effort i'd need.

We hung out a few days back, she told me that she thinks im whiny when she doesn't react how i want and i feel as though i come across as suffocating, she told me i need to learn to read her better, because i talk to her when she's stressed which irritates her.

Yesterday and she was very closed off towards me physically, her friend told me that she's lost interest in me and is finished with our relationship. For a year we got on perfectly and genuinely cared deeply, but in my attempts to make her feel better it caused issues because i took the wrong approach. Her friend reckon there's still something there but because she's so stressed she's shut me off completely and doesn't want to take on more emotional issues so i've been pushed away. Do i create space and wait until her stressors go? Recently she's slowly began to open towards me, but I've reacted too quickly and she would retreat. Our friends think if i wait, and then take things VERY slowly it will rekindle. Is her telling me what im doing thats annoying her a good thing so i can fix it? is this redeemable? because i think she's trying to push away her feelings atm

She lost interest through stress, how do I win her back?
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