Yes you can keep the baby but how do you plan on providing for the baby? Also what state are you in as your boyfriend can be in serious trouble.

You can keep the baby - the circumstances of how you got pregnant do not dictate whether you can parent or not. Your boyfriend, if he is the father, is on thin ice as he is guilty of statutory rape given that you are a minor and he was an adult when you conceived. But at 15, how will you support the child? Will your parents support you and the child? How will you finish school? Does this boyfriend have any money or a home or job? Is he supportive?

In my opinion PLEASE. My cousins were grown up until they were 3 and there mother turned 19, and she was normal and they grew up w/ their grandparents. Then they just couldn't do it anymore and had to be put up for adoption. They have post traumatic stess disorder from age 3.5 because they didn't have a mother or many other normal kids around them... I really strongly think you shouldn't keep the baby but I'm a guy over the internet. Think about him/her too. It's a human being too, and your just half of this and then add your parents and the people around you. You should try and get him or her adopted. Newborns get adopted like wildfire as it is.
You should see a counselor trained to help you make a decision. They don't tell you what to do, but instead just ask you questions to reveal more about it. Pretty much it. You're honestly too young to make decisions alone. That's why you have parents and can't live on your own. It's their house, so they have just as much say as you do. I don't mean to be mean or call you out but accept you made a mistake, and then move on and do what's best.

I would not presume to tell a birth parent what her best choice is not knowing the type of support you have available to you but can tell you I adopted my son at age two. He had a teenage mother and father who tried to parent and could not. Their relationship did not survive the stress of parenting, and their parents were not able to help financially or otherwise. My son ended up being neglected and abused by otherwise good teen parents who could ultimatley not handle the stress and had no means to provide for him, so he paid the price for their effort to parent in very unrealistic circumstances. He was placed in foster care, and remained there over a year until finally the state terminated parental rights and he was placed with his father and I. I know his birth parents meant to do the right thing, but it was very traumatic on my son in many ways and I would agree to be very realistic about what you can manage. We did an open adoption so my son still has his birth parents in his life but they have no responsibilities for him at all. For us it ended well and his birth parents often tell me, "I wish I knew about this when we had him - it would have been so much better from the start". Bottom line is you will not be able to afford this so unless you have supportive parents who can care for him and support both of you until you finish school and can get a high paying job (daycare alone is over $100 per week at least) it will not be realistic to parent. Think of what's best for your child, and for your own long-term future.