How do I control my Borderline Personality Disorder?

There are periods were I become extremely emotionally negative when I reach extreme loniness. I use suicde threats just to end my loniness and pain by the attention I get. It helps, but my mental sickness is still there. How do I fight it?
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How do I stop resorting to these immature method? If I don't do that, I'm going to burst emotionally and do something worst. I rarely reach this state and disappears from a couple of hour with a drastic personality change.
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I just need a healthier way to burst my emotions when they become extreme. Any advice?
How do I control my Borderline Personality Disorder?
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