My fiancé makes about £90k pa plus bonus. I used to earn extremely well as a lawyer but decided to career change as I loathed the work and long hours. I now earn £35k with good future earning potential. We live in London and pay about £3000 pm for mortgage/bills which we split mostly 50/50 (see below).
Currently I'm about £200 short per month. I'm doing my best to increase my income and reduce expenses, but ultimately £35k doesn't go far in London so I'm finding it a little stressful. Part of the problem is that my partner isn't making it easy to budget - he insists on staying in London (I want to move) and because he earns well he wants to regularly eat out, go on holidays, buy what he wants in the food shop etc. It feels silly to say that I'm finding it hard financially on a household income of £125k, but obviously the vast majority of that money is my partner's and not mine.
I was reading online that some couples split bills as a proportion of their income, rather than 50/50. So today I asked him if he would mind paying a little bit more of the mortgage so that I have enough to break even, just temporarily until I'm able to get a promotion. He told me no, it was my decision to take a pay cut. He also pointed out (reasonably) that the bills have gone up so he's already paying about £200 more than me as it is (the bills come out of his account so I wasn't aware).
I can see his point of view so I'm not sure if what I'm asking is cheeky or reasonable. Please be gentle, I'm aware that I'm in a privileged position compared to a lot of people.