@solidaritysoul, you ask a very good question: How do you love yourself?
It seems like a simple question, but the answer has many layers and is different for everyone.

First of all, I want you to know that you're not alone. It's not uncommon for people of any age to ask that question, to feel unworthy of love or to find it impossible to love themselves. Coming out of that hole is hard to do alone. But you've taken the first (and hardest) step -- asking for help.

I recommend that you reach out to someone to talk with who can help you find your answers. You don't have to do it alone.

There's a national organization called NAMI (https://www.nami.org/) that has chapters in each state, for example here are the websites for
Minnesota https://namimn.org/
Wisconsin https://namiwisconsin.org/
They also have Campus Clubs at some high schools. You can find your state or even your high school here: https://www.nami.org/kids-teens-and-young-adults/youth-and-young-adult-resources/nami-on-campus/nami-on-campus-high-school/

Here's a page just for teens
https://www.nami.org/kids-teens-and-young-adults/teens/
I don't want to overwhelm you. I send all these links so you can see there is help out there.

I'm glad you can talk to your mom. Sometimes it can help to also talk with a counsellor or a group. What do you think?