Delusions don't have to be 100% believed. They can be 10% or 90% believed.
Sorry about life being upturned by your mental health problems. You and your family are very strong.
I just want you to know that you may feel unloved and you may act unloved, but you are loved. That part is not a delusion, it is a fact.
Although your experiences with feeling liked, appreciated, and admired are imaginary at the moment, they do not have to be.
I suffered from symptoms somewhat similar to yours in my teen years, and suffered from very low esteem. I still have a low esteem, but I am convinced that I can be loved and occasionally admired. You are no better/worse a person than me and so you can get the love and apprciation you deserve.
The psychiatric angle you seem to be taking is valid, but I think you could also benefit from good psychotherapy, after being stabilized by a psychiatrist. Sometimes people need thier thought processes reset, so they can see the potential beauty in the world and themselves.
PS: I just saw the question in your thread title. I think you should look for such help in person. Still, we are here to chat and support you.