<human>: Long story: I lived with past girlfriend in a flat that we rented for one year, then re-upped for two years. We broke up almost immediately after resigning and have lived apart since, with me still paying half the rent and leaving all my belongings there. 

In this time I met someone else, have moved on and am expecting a baby. I need to leave this flat financially as I cannot afford to pay two rents and need to start saving for a deposit on a new flat.

We do not have a 'break' clause in the contract, which started November 2012 and ends this coming November, in 11 (or 10) months. I can't afford to pay off the remaining contract as I have no savings to speak of.

I am prepared to vacate and break the agreement losing the security deposit (with notice to my letting agency), but will there be any ramifications from my doing so? Am I leaving myself vulnerable to owing a shitload of money?

Can you condense the text into a few key points?
<bot>: Tenancy agreement with security deposit has ten months to run. If I leave and break the agreement, am I screwing myself?