Wow! That was crazy to read! I sort of have the same issue. Sometimes I find it good to look at my situation as if you were not in it, like you're helping a friend. What would you tell you're friend asking these questions?
I would have to agree iona in regards to the whole job thing. I know what it's like to financially unstable and it is one of the most depressing horrible things ever! Especially considering you are the man it must be even worse for you.
Now if you were feeling irritated because you woke up coming down or whatever you need to just communicate with her and tell her how you're feeling, that way she doesn't take it personally or make up her own reasons for why you are mad. This saved so much drama trust me!
I think what you guys are lacking is communication. She obviously needs you and is probably confused about her feelings because the whole love you don't love you thing is just screaming confusion. Maybe talk to her about both your feelings and tell her that when she gets mad you want her to speak to you truthfully not throw all kind of crap out there to tare you apart and leave you feeling horrible. If you both love each other despite the issue, because we all have them, you should not want to hurt each other when you're angry you guys should want to sort the problem out as soon as possible so you can go back to being the best together. Tackling the problems as they arise will save you both on gas trust me!
The guidance thing is good too but you don't want to use it as an excuse when situations come up because she'll get over it real quick. Just talk more, talk about everything! If you've known her for 6 years you should be able to talk about almost anything
I think it was a mixture of wrongdoings by you both. If her dad just died in her back seat and you're busy worrying about you're interviews the next day you need to think about how she would react to situations before you do things and she also needs to understand that you need to get a job. If you explained to her that you love her and you are just going to grab your clothes but you would have been back to hold her or whatever she can't fault you.
So yeah communicate more and give it some more time, if you love each other you should try to make it work because fighting for someone you love shows them just how much you really do care. Goodluck!!