Am I the only one?

So about 8 months ago I was pregnant, my boyfriend and I had only been back together for 5 months after a break up of 6 months (together for 3 years on and off) I found out I was pregnant and he made me get an abortion, I thought it was the right thing to do but everyday since I had the abortion all I see is babies, half my friends have babies, well most of them do actually. I'm only 19 and I can't help think that it's wrong to want a baby. I miss the thought of being a mother though. I miss knowing I had a little baby inside of me. I was 8 weeks when I had the abortion and I still cry over killing the little one. 
Am I the only one to think like this after aborting it? Am i selfish to want it back?