Well Pint. You have to pay the money back. There's no way around it. When you say 'I am also insured so that in any case of un-foreseen circumstances the insurance company will cover my loan' you are talking about payment protection insurance. This is designed to meet your repayments in CERTAIN CIRCUMSTANCES e.g. if you lose your job, gte sick etc. Moving abroad is probably not covered!
You will need to talk to your bank about maybe increasing your payments before you leave. Basically, you will either have to pay the lump sum, or your other option is to do a runner, which means they'll be chasing you for the money & you'll have difficulty borrowing in Ireland again.