How to talk some sense to her without hurting her

I have best friend who lost friends as fast as she gains them. Shes so friendly and lovable. Shes also very genuine about her feelings and compassion for others and I value that highly. However, when you get to know her further, shes somehow hard to deal with. She couldnt control her emotion in almost every situation, so she often makes people uncomfortable. She doesnt hesitate to pick fight with everyone she thinks is wrong, again without considering the situation. Her actions often make people puzzled. Everywhere she goes there will be drama.

Despite her age shes not mature, she doesnt have the confidence to do her own things on her own. Because of this shell ask others for help even though she could do it by herself. Whenever she feel upset she will ask people to accompany her (stay at her place) and if they have to reject her because they have their own priority, she shows her disappointment blatantly. I mean, theyre sorry enough to turn her down, should her make them feel even more guilty? (I learned to coldly turned her requests down and made sure that my time alone is everything for me lol so I dont get this dilemma my other friends are having). Many times we found ourselves having trouble on how to talk to her because we don't want to make her upset (I guess this is normal in friendship but with her it's a different level, I could elaborate if needed).

Shes been hurt a lot by people turning their back on her. Its not rare to hear people grow tired of her. Ive told her many times that not all people are ready for our shts so we need to respect their boundaries. But she doesnt seems to get it. It keeps happening, people grow tired of her, and shell be hurt.

I love her, I dont want her to get hurt or get hated by her own actions. But then heres the dealbreaker, shes notorious for being a blabbermouth. I thought she learned her lesson when her crush got really angry at her. But she didnt. Recently I found out that she tells others about my mental issue which Ive been trying so hard to keep from others.

I dont want to give up on her. Shes just too clueless. And I dont trust anybody to bear with her as much as I do. I do hope she finds someone whom she could talk with, who accepts all her antiques, who let her be whatever she is(?), but until that person come I dont think anyone could be as frank as I do with her while still giving her love that she deserves. But this time, because Im angry too, Im afraid shell get defensive and Ill dont know what to do with her anymore.

Whenever Im tired and dont have the capacity to deal with her (I need to take care of myself too), Ill just distance myself from her for awhile. And then I thought she got better, but no, these things keep happening and Ill have to deal with seeing her sad because of herself, because she doesnt want to hear her friends. No matter how much her friends try to talk to her, theres only so much we could do, right?

I wonder why she doesnt get it. I wonder how to talk to her. I wonder will she ever meet someone whose opinion finally manages to get into her head. I wonder if I, as her friend, will just have to bear with this role seeing her destroying her own world.

What do you think I should do?