it may be inner critic or... maybe you are experiencing OSDD/DID/other form of multiplicity
I want to say to both to you that it's ok to feel pain and show the pain (not always safe but it's valid) pain can be shown
you said your parents love you. i suggest you thinking about telling them about your problems. it's ok to tell people about your problems. people tho care they don't want you to suffer and may want to help you... but sometimes in a wrong way so think about it
and it's not like you are not wanted. your parents will care if you commit suicide, maybe other people too and you don't know it
oh and let me talk to the other voice:
hi my dear. I know it may be annoying but it will not gonna help. the thing you are doing right now. they (the other you) will not change if you keep breaking them... you shoud see it in these texts. I know you may be mad, I know they may not know your pain, shit about you and the world or anyting, I know you can be mad. that's ok. I know you are probably hurt. Both of you are hurt. And that's ok. I'll not try to change you. I wanted to tell you that I see you <3