Keeping the baby or not?

I recently found out im pregnant and my bf wants to keep the baby and so does his mom but i dont. And now him and his mom are going to convince my parents to letting me keep the baby. He has told me so many times that this is my decision but keeps telling me to keep the baby. Im not even sure i want to keep the baby. Im still in high school and just want to get my diploma. I honestly don't know what to do.