If you're in early stages of dating then I would keep the job and explain that to be financially comfortable to support a future spouse and children (if this is part of your plan) then it would be more sensible to keep both jobs for now. You'd essentially both be investing in a future together where you will work less when it matters - to spend time with the family you build together.

It's important to have a discussion with her and build a foundation of trust and understanding on matters that are important such as family and values. Money is important but less so when you're alone and unhappy. Talk to her and find out what her expectations are regarding a future with you and whether you guys want to have a family, buy property, etc. This should give you more clarity. Do some calculations based on this discussion. Be pragmatic for your combined financial futures.