Kayla,
If you want to have the baby do not let your boyfriend or anyone else force you into having an abortion. Fourteen is very young to be a mother, but I do know girls who have had children at 14 and were very good mothers for thier children despite their young age and the circumstances of their pregnancy. It will be possible to continue school and raise a child but it will be more difficult and you might miss out on many opportunities that you would otherwise be able to have. You might consider adoption as an alternative. You could potentially even have an open adoption in which you could still have contact with your child after the adoption. Since you are so young it will be best to have all the support you can get. It is good that it sounds like your grandparents will support your decision to give life to this baby. I would talk to them and let them know about the pregnancy. Best wishes.
Kate