Second time pregnant, though first child

I had an abortion about nearly two years ago, we weren't ready during the time, we actually started dating a few months before I got pregnant that time also, I'm so scared to be pregnant at 19 though... It's kinda tough for me right now, though whose experience wasn't tough? I'm having doubts about keeping this child, though my boyfriend pretty much told most of the people we already know that I'm pregnant, I'm really scared shitless this time since I'm already 8 weeks pregnant, I know I have time to think about it, though seeing how proud my boyfriend is for being the father of the child, I don't want to ruin his happiness, I know he'd understand, though with my experience after the abortion from me fainting in the train station, I don't want that happening again and the grief I felt after I did the process of the abortion... I don't know what to do... I half want to keep it, I half don't want to have this responsibility...