Should I break-up with my consistently sad gf?
Have you had a conversation with your girlfriend about her depression?
No, I have said nothing to her
It's good to have a conversation with a significant other about worries.I think it's incredible and important that you have noticed what she is experiencing. I also understand how it might be a bit draining for you. She's fortunate to have you and I hope you can sit down and speak with her and let her know that getting help from a mental help from a mental help professional could be beneficial.
I suppose it's not a big deal and I'll see if I can help her get better.
It is a big deal, as her mental health is important and it effects you to. Partners have to support each other and be honest with each other. Support and encourage her.