It fucked me up, y’all
Nas is saying that when one of his close freinds Stretch died it caused him to realize how close he was with death living in the tough streets of New York. in the previous lines Nas comments on how possible it could have been that he died the night that Stretch died. He had just talked with him hours before Stretch died. He says how this realization that Nas could have easily been the victim Stretch was, messed him up.
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