Some posts gave me the impression a baby will not hinder you at all which I think is wrong. Sorry.
You may be able to go to Uni or get a good job, but it will change your life. And it will make it difficult for you, no matter how much you love it. It can be really nice to have a child, but there are "disadvantages" too, especially at a young age.
And I'm not saying you should just try to erase it e.g. abortion and then just forget about it. You won't be able to do so, it will stay with you forever, you will not forget this. But you could have children later on. When you are settled (maybe married) have a job etc. etc. It is your decision to make NOW:
You should think everything through. Make a list.
-When do YOU believe life begins? Personally, I don't believe in this conception-thing, but that's up to you.
- What are your plans for the future; would a baby be too much maybe? Working long hours, exam stress, consider everything!
- Talk to your boyfriend. He's with you in this, and it's his responsability, too.
- Do you feel ready? I certainly don't but what about you? Do you think you could raise it?
-Will your parents help you?
- ...
I beg you to consider that even if you BF says now he wants the kid, he could change his mind (not saying he's bad or anything; he is 17(?) and that is very young for becoming a father/parent; most guys would just run, it's good he wants to stay)
Please, before you decide anything, think it through. It is a life-changing decision, no matter how you choose in the end.
I wish you all the best.