15, raped, pregnant

So I'm pretty safe about sex. And I have frequent sex with my boyfriend. Condoms every time. But recently I was assulted. Since then I haven't had sex. I didn't tell anyone. And I found out I'm pregnant a week ago. I'm not sure what to do. I'm scared and I'm crying. How do I tell him I was assulted and didn't tell him. How do I tell him I'm pregnant with another mans baby. How do I tell anyone? What do I do? How do I feel okay with this? Is abortion okay? I'm only 15 I never asked for this. Help.