I truly do feel sorry for you. I know it must hurt that all these people are calling you stupid and telling you for being with her but I fully understand where you are coming from. You love her so much you see past all the negatives of it as I would do the same with my boyfriend. At the end of the day you have to ask yourself this question, am I happy being with her? If yes, then continue being in the relationship however if the answer is no then you know what to do. It's very natural for you to be territorial and possessive as I'm sure 99% of people in relationships are too, especially in this case. But also I would advise you to sit down a have a chat asking her how much do YOU mean to her, does she see you guys spending the rest of your lives together and what is more important her job or being with you. I completely understand finances are important to her but she could get another job and also she will get student finance so its not like she completely will have 0 money for herself. Yes she will have less money as you said but at least your girlfriend will be 100% yours. At the end of the day if I was in this situation I would quit the job for my boyfriend in a heart beat and if she truly does love you and if she sees a future together she would do the exact same.