abortion ? when is it okay.

I recently found out I was pregnant. I am a strong believer that abortion is not the way to go. But my boyfriend doesn't want the baby. He says he'll support me in anything I decide but it's clear he doesn't want it. Also he told me. I want the baby. I am only 20 and living at home but I never thought that at only 5 weeks I'd want something so much I didn't wanna let go. Is it okay to have an abortion for someone else and because of the fear of life getting rough or what..? 
What are your thoughts on abortion .. and what should I do. I need advice. 
Also I haven't told my mom or anyone so I'm like freaking out idk what to do