Help! :(

I had a baby eight months ago, she is my second and I gained a lot with her then I did with my first but it wasn’t till the end. I breast fed her and lost a ton of weight. I can handle the stretch marks I know they become less noticeable the more time goes by. But my belly button is all wrinkly and no matter how much weight I lose I can’t seem to tighten it up. Is it possible or am I doomed with this? I wanna be able to love my again and wear crop tops and cute stuff but I feel like my stomach looks gross. I even cry to my boyfriend about it and say it looks like a butthole :( I’m so miserable. Don’t get me wrong I am so greatfull for my daughters and I love them so much but I feel like crap about myself. Help?