Love is dangerous. First, it can kill people. For example, in Romeo and Juliet, they loved each other too much that they want to prefer death when their parents do not allow marrying. But it is impossible to marry because their families are mutual enemy to each other. As a result, Romeo and Juliet both died.
Second, It can make other people feel jealous so it can cause jealousy kills. In movie 'Saw's prologue version, the white guy is very jealous because the woman who he loves secretly fell in love with one man, so he vowed a revenge to cruel world. Then he started to make lots of outstanding traps and huge prison for his revenge.
In conclusion, love is good but sometimes dangeours.