S.T.
you're in a difficult spot but there are some backhanded pluses here.
you don't want to tether yourself to any man at 16. staying free of him while he remains in the baby's life is perfect. hopefully he and his family can help out while you pursue your education- including college so that you can support your baby unassisted at some point.
going to school while mothering isn't 'missing out on your child's life.' most babies have working mothers or mothers in school these days. my kids were in daycare from early morning until early evening and yeah, i hated it. but they're fine and it was just what i had to do.
your education is hugely important. doesn't much matter whether you get a GED or stay in school in the long run, but in the short run staying in school is almost certainly in your best interest.
as you point out, you're probably not ready for the GED yet. you still have two years of school and staying IN school is the best way to do it. if you 'give up' your senior year and fail your GED, however, it's not quite the finality you imply. you can always study and take the GED again.
or stay in school.
you can't homeschool yourself (or you can, but without a background in homeschooling and being pregnant it would be super difficult. and not legal.) if your parents aren't willing to homeschool you, that's not an option. if they are you can go to the library to use the computers there.
but i think you should stay in school. the notion that this will make you 'lose' part of your child's life is just drama. look at it this way- what you'll actually do is demonstrate for your child that difficulties and poor decisions aren't life-wreckers. you'll be a living example that perseverance and courage, even when things get tough, are traits you're passing along.
it won't be easy. but quitting school and pretending that parenting doesn't require anything but attendance aren't ultimately 'easy' either.
khairete
S.