Yes it is blood borne and yes risk is very low for long term magnanimous couples. There are many examples of people married for many years where one has hep c and the other does not.
However if you are not in a long term relationship there is a small risk especially if engaging in rough sex practices
Can HCV be transmitted by unprotected sex? I thought it is blood borne
"How do u know if u have Hep C?"
You get tested it is the only way to know for sure, most people never have any symptoms.
How soon after exposure to HCV can anti-HCV be detected?
HCV infection can be detected by anti-HCV screening tests (enzyme immunoassay) 4–10 weeks after infection. Anti-HCV can be detected in >97% of persons by 6 months after exposure.
How soon after exposure to HCV can HCV RNA be detected by PCR?
HCV RNA appears in blood and can be detected as early as 2–3 weeks after infection.
http://www.cdc.gov/hepatitis/HCV/HCVfaq.htm#c5
"Wat are the symptoms?"
What are the signs and symptoms of acute HCV infection?
Persons with newly acquired HCV infection usually are asymptomatic or have mild symptoms that are unlikely to prompt a visit to a health care professional. When symptoms occur, they can include:
Fever
Fatigue
Dark urine
Clay-colored stool
Abdominal pain
Loss of appetite
Nausea
Vomiting
Joint pain
Jaundice
What percentage of persons infected with HCV develop symptoms of acute illness?
Approximately 20%–30% of those newly infected with HCV experience fatigue, abdominal pain, poor appetite, or jaundice.
How soon after exposure to HCV do symptoms appear?
In those persons who do develop symptoms, the average time period from exposure to symptom onset is 4–12 weeks (range: 2–24 weeks).
What are the signs and symptoms of chronic HCV infection?
Most persons with chronic HCV infection are asymptomatic. However, many have chronic liver disease, which can range from mild to severe, including cirrhosis and liver cancer. Chronic liver disease in HCV-infected persons is usually insidious, progressing slowly without any signs or symptoms for several decades. In fact, HCV infection is often not recognized until asymptomatic persons are identified as HCV-positive when screened for blood donation or when elevated alanine aminotransferase (ALT, a liver enzyme) levels are detected during routine examinations.
http://www.cdc.gov/hepatitis/HCV/HCVfaq.htm#c5