I need help with some punctuation on this sentence. After "upbringing", should there be a semi-colon?
I have come to realize that it is the results of our upbringing that in this past family, blood was not thicker than water.
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1. it should be "result" not "results".
2. you don't need a semi-colon. however,
3. the sentence is not extremely well written and somewhat unclear. "that in this past family" is fairly confusing.
When you feel an urge to add more punctuation to a sentence, you can often achieve even better results by shortening it, or breaking it into more than one sentence.
For example, in this case I think you can achieve your goals better by just shortening the sentence. For example: "I've come to realize that in my family blood is not thicker than water." You can add context or explanation either before or after. For example before: "When I was 10 such-and-such happened. And then, again, when I was 14 this other things happened. And you know what? I've come to realize that in my family, blood is not thicker than water." Or after: "I've come to realize that in my family blood is not thicker than water. When I was 10 such-and-such happened. And then again..."
One of the difficulties in writing is that when we speak, it is not that often that we speak in complete sentences. We tend to use phrases, sentence fragments, run-on sentences that change their direction in mid-stream, depending on the reaction from our speaker, and so on. It can be an actual challenge to discipline yourself to write down one short, complete sentence after another. It may "feel" wrong -- stilted, unnatural. But what you may find is that, on re-reading it, after you have done writing, it doesn't actually come out that way. When we read a series of short complete sentences, our mind tends to just edit out all the stops and starts, and the whole narrative flows as if we were hearing the much looser style of someone speaking.