I'd like to start by saying that I'm sorry that things have played out this way. I think that the first thing to do is to go to the doctor's to get a confirmation that you are definitely pregnant (pregnancy tests can, in rare cases, result in false positives). If you've done this already, and you are certainly pregnant, then I'd like to say congratulations on the pregnancy.
After that and before anything else, I'd recommend you get advice from the doctor's. I'm not an expert, but I believe it's important for every woman to know all about pregnancy: all the stages, and all of her choices, rights and responsibilities, so that she can make a decision she feels is best and will not regret later. I believe that the law says you are free to decide yourself whether to have your baby aborted if you are less than 24 weeks pregnant unless there are substantial risks to your health. Another option is to give birth and then put the baby up for adoption. But you're best off getting advice from the doctor.
Now, about your boyfriend, I'm really sorry he has reacted this way. It is important for a child to have a stable environment to grow up in and it's the parents'/guardians' responsibility to provide that. And it's also important your relationship is healthy for your own sake. If your partner is threatening to break up with you and is not going to respect your decisions, that is not good. But it's up to you what you do. If you do end up keeping and giving birth to the baby and think you need an extra hand, you might benefit from hiring a babysitter or a caregiver to help you when you need it. Again, the doctor's will be better than me at giving advice on this.
I wish you the best and hope everything works out 