am I being selfish?

I'm 21, I work at a good job, I have my own car and I love at home with my mum. I'm currently 12 weeks pregnant and with my boyfriend of 4 years. He wants the baby. I'm not sure if I'm ready. I'm worried about what my family would say. But I think we can provide for a child and stuff and it would be fine. I just don't know if I'm ready and I'm very scared about what my family would say so I am considering abortion. Am I being selfish? Please give me advice