bummed out pregnancy

I got pregnant unexpectedly. Not what I expected. I'm 20, going to be 21 on October and so far, I'm 7 weeks pregnant. My so is so pumped that he's going to be a dad. But me on the other hand I've been bummed out, disappointed. I wanted to finish college, most of my friends are young  and i guess I had a lot to live. A baby is always a blessing but as of today, I'm not as happy as how I would want to be. Anyone else feeling the same way ? Or any advice ?