I know you're not only looking for sympathy but I'm sorry that has happened to you. I have felt like that before. What i have learned is that people like that are not truly your friends. You must be vigilant in separating the people that truly care about you and the ones that just want to use you as a tissue. Then again you can also find comfort in the idea that these people that look for you see you as a person they can count on in times of stress. But if it's causing you stress or anxiety them it's probably best to keep your distance.