Feeling Jealous of my friend

I'm really feeling like s**t right now..

One of my best friends is 7+ months pregnant and lately it's been really difficult for me to be around her. I love her to death and her baby but I'm feeling like she doesn't appreciate what she has.

She's having baby #2, she had her first one when she was 20, now we are both 27. She wasn't TTC and all of a sudden, she's pregnant. I've been TTC for 6 months now, and I know it's a dumb thing since some of you've been trying for years now, but I feel really sad, jealous, and like crawling to my bed and crying all day whenever I see her...