Firstly, go to GP if you haven't already. They will be able to give you some impartial advice.
Please don't listen to the people trying to scare you off, especially in regards to medical advice about fertility after abortion, they really don't know what they are talking about in comparison to a GP.
Next, explore ALL your options. Don't dismiss an option immediately just because you don't like the idea of it (e.g. abortion) or because your boyfriend doesn't want to do it (e.g. adoption). Actually look into them all. People often don't like the idea of abortion, but when the other option is to bring a child into this world when you won't be able to care for it in a way you would like and causes you to not be able to have the life you want, it may become more appealing. On the other hand, you may find that your or your boyfriend's parents are willing to help out financially with the costs and also help to look after the baby which could mean the child has a good upbringing and you are still able to go to uni. But you won't know this until you look into it.
On a side note, please reassess how "great" your boyfriend actually is - it very much sounds like he is trying to push you into an abortion by threatening to break up if you don't have one and have the baby instead, this is not something a "great" boyfriend would do.
In the end, although your boyfriend, parents, GP etc have a say in what you do, the decision is ultimately yours OP, and you need to make the right choice for you at this time in your life.