Removing One Party from a Mortgage?

[Christopher Reynolds]

Hey everyone. My girlfriend and I own a triplex together. We are both on the mortgage, jointly and severally responsible for payment. We were wondering if there is an easy way to make only one of us responsible for the mortgage. We'd like to acquire another property, and we wouldn't necessarily need both of our incomes to qualify, though if our current property is paid for by both of us, it might reduce our purchasing power. Is there an easy way to accomplish this? Should we just call our lender, or would it not really be possible? Thanks much!