Hi guiltier,
Just because you haven't got an
identifiable reason (although chemical imbalance or biological causes could be very good reasons in the absence of others) doesn't make it any the less real/hurt any the less

And to me entitlement/the right to feel pain/depression doesn't come into it, it just is, you
don't choose it, you
wouldn't choose it, and
everyone's pain/depression matters regardless of who they are

It's kind of like if you break a leg and your neighbour breaks two that doesn't mean you shouldn't be allowed to experience the debilitating effects of breaking your leg because they have it worse...........pain is pain..........it is, and it matters!!
And you know..........if you actually talk about your experiences of depression it might actually help
you both...........there are going to be
some things she is going through that you can maybe identify with...........help her feel less alone.
My guess is that she isn't going to want pity
or sympathy but
empathy, and that may be something you can give each other??
So maybe look for similarities instead of comparisons???
Depression can isolate people so much in itself, but that you can maybe help a little. for you and for her, by talking about what you're going through???
Alison