Coping with stress

I'd like to believe each of us has our own form of breakdown from the stresses of work, our personal issues with the people we care and our struggles against ourselves. Mine I guess is in the form of anger, a hurricane-like rage weaponed by a very sharp tongue. When I reach that boiling point, I'm at a verge of breaking down. This much I finally learned about myself, a day before I (hopefully) turn a year wiser.

They say we breakdown sometimes because it's our body's mechanism to step in the brakes, to take a step backward and reassess things or just take some time to rest. I breakdown too. Not very often but I do. And when I do, it's really bad, I become a person I hate. Like last night, I was so angry at my sister for not behaving properly, for not putting her children first, but instead flirting. I was so angry because she's been disappointing me all her life, and I honestly feel that I let my parents down, that I let myself down, that I wasn't a very good older sister because I didn't raise them in the best possible way. This is the biggest stress of my life.

I guess I can blame it on me turning 34 tomorrow, but then I start to shrug it off. I have made a very good life for myself, so different from them, that most of the times I don't feel part of the family, and I am finally beginning to accept that it is not a sin to achieve much, it is not my fault that some of my siblings are falling short of my expectations. That perhaps, their own expectations of themselves are not the same as mine, and that perhaps they are ok with that. I have done my part, I have done what I could in the best possible way I could have, so I don't want to stress so much about it and I don't want to be angry towards them or me just because I keep on succeeding.