Help ?

What is is called when you’re over 18 and still feel like a kid. For example get mad over anything, complain about everything, worry about what other people thinks, gets sad if someone is not your friend and things like that. Any advice on what can someone do to grow out of it ?

It’s affecting my social life and relationship with boyfriend and family.

I been to the psychologist since I also have a problem with my attitude but no matter how hard I try to change and do better I still can’t figure out how to. Also, I pray every night so god could give me a hand and take all this negativity but is not working and before I used to be more positive I have always had an attitude my whole life but is affecting me a lot now. And I don’t want to loose my boyfriend and family members because of it. Any advice is welcome.

Also, I’m always sad too and depressed to the point where I don’t want to go out, eat or do anything and it sucks because I just want to be happy but every day is getting harder.