How can I stop being so insecure?

After having 2 kids, I got really skinny & I’m not even sure why or how. I eat the same but I’m still so skinny. My butt is also completely deflated. I used to actually have a nice firm butt. My boobs have always been small but now they’re small & saggy (because of breastfeeding).

I found out my husband watched porn after he told me he never would.

My dad told me that I’m too skinny with a grimacing face

My sister told me that I’m so boney

My brother told me that all my clothes look baggy on me & that I don’t eat enough

I know I’m skinny. But all of the above makes me feel not only skinny but gross & unattractive.

I hate going anywhere now because I feel gross.

I always wear cardigans or something long to cover up what used to be my butt. I feel like everyone just finds me gross. I can’t stand to look in the mirror & I just wish I loved myself again.