You can really get sick from worrying about your love life. Researchers at Ohio State University studied nearly 100 couples. They found that those with higher levels of anxiety, had higher levels of the stress hormone: Cortisol. They also had lower levels of T-cells, which help the immune system fight off infections. The researchers did not find out whether the partners with high anxiety actually got sick more often, but other research has found that chronically high stress hormone levels can have an ill effect on your health.