Not move to Poland until you're all paid off, or move to the UK where you can both work and make enough to pay off your bills. You may find it difficult to find a good paying job in PL. My GF wouldn't want me to move there for that reason. Not much for either of us.
I have a question:
how much of the outstanding loan do you have? I don't need to know). I am asking beause you can be paying it off after getting the CELTA certificate (job and working visa guaranteed) and will also prepare you to give some extra tutoring lessons which could go towards paying off your student loan while in Poland. It's better to go abrad having a job waiting for you, if that's your case. It will also give you alittle more independance form your girlfriend in regards to finances.