I have no problem admitting that I'm ungrateful person.
Why would you feel fine admitting that?
No one has ever done anything for me.
You can't expect people to do things for you. It's wrong not to be grateful for the things and people in your life.
You don't get it. I've never had a loving family.
I do understand that, but you shouldn't let that affect your whole social life. I think therapy would be beneficial to you, they can help you get back on track.