Pregnant and Alone

So now, I'm 5 weeks 1 day pregnant and I only found out I was pregnant 5 days ago. The man I've been seeing was at first supportive and we made a plan of action as to abort the baby. Now, 5 days later, he's saying he doesn't feel the same he once did towards me and how he doesn't want me to do this alone but in all reality, I am alone. I went to the ultrasound last week alone and fell in love with this tiny fertilized egg but apparently he didn't. I'm only 19 so I know it's the right choice to go through with the abortion but now that I'm alone, I don't even want to do the abortion because I'm so scared. Feeling uncontrollably emotional.