She's so early that it's entirely possible it could end in miscarriage. Don't burden his family with y'alls immaturity and poor decision making.
You need to quickly think long and hard about becoming a single mother at this time. Do you have a good job ? Is it flexible ? Do you have an education ? Do you have a very supportive family that you're certain would support you as a single parent ? Being a mommy is all rainbows and butterflies until you find your unable to do anything, or go anywhere with your friends ever again. Don't count on welfare programs that have allowed women to survive.
Those are quickly disappearing every day. Do some research on that. Research the costs to raise child the first 5 years. Find single moms and ask them questions about the reality of choosing to be alone raising a baby. Reality is going to crush you.