Besides taking an emotional toll, loneliness can cause physical problems, too. Studies show that lonely people have higher blood pressure, which can cause heart disease, than people who don't feel lonely. If you aren't a loner by choice, how can you cope? Using real-life examples and quotations, Lonely Girl? Girls Dealing With Feelings discusses the biological, emotional, and social effects of loneliness and provides research-based information on the best ways to overcome it. Take a quiz to find out if shyness is keeping you from making friends, and read tips on how to be more social.