why can't I loose the weight ?!

I understand I'm only 2 months pp but damn I keep seeing all these women that look amazing ! I'm so jealous of these girls that got no stretch marks and no tummy flab 😡 my boyfriend keeps saying you just had a baby ! Relax but it's hard to keep that in mind when these other girls on my timeline that JUST had a baby as well look like they never did ! I hate being this uncomfortable with myself 😩 anyone else feel this way too ??